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TOPIC: Buffing the bottom....tips?

Buffing the bottom....tips? 28 Aug 2017 00:59 #1

  • Doubled50
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My boat has a definite scum line, most likely from the previous owner keeping it in the water for extended periods. They cleaned and waxed the top, but my OCD can't handle the yellowing. Today I got a buffer and some rubbing compound. I've been smearing it on with a cloth, letting dry for about a minute, then buffing off. It's taking 2-3 passes to come clean. What a pain to lay on the driveway. Any tips or ideas from anyone that does this? It's on my trailer obviously, wish I could suspend it from a hoist or something. Any better cleaners? It's turtle wax brand rubbing compound. Very long and tedious process, I'm assuming there's no better way. I can see the difference. When I'm done I'll give it a good wash and wax.

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2001 Bayliner Capri 1950 CL

Buffing the bottom....tips? 28 Aug 2017 01:07 #2

  • builderdude
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3M super duty compound, be careful it'll cut fast but does break down as you work it. Probably starts at around 1000 grit and ends up at around 1800 by the time your ready to wipe the haze off.

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Dave
Edmonds, WA
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www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556
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Buffing the bottom....tips? 28 Aug 2017 01:29 #3

  • green650
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You guys are OCD. :)
Looks beautiful but I don't have that kind of time or patience.

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Buffing the bottom....tips? 28 Aug 2017 01:32 #4

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green650 wrote: You guys are OCD. :)
Looks beautiful but I don't have that kind of time or patience.


I've been using my boat as much as possible, I do currently have a bit of a scum line :lol:

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Dave
Edmonds, WA
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'93 2556 5.7 Bravo II 2.0:1 18 1/4x19 P
.030 over-Vortec top end-part closed cooled
***The rebuild of my 2556***
www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556

Buffing the bottom....tips? 28 Aug 2017 03:01 #5

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Nice! I gotta get some. Wonder where I'd find that locally

Do you just squeeze it onto the buffing pad then? How much will I need to do the whole hull?

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2001 Bayliner Capri 1950 CL

Buffing the bottom....tips? 28 Aug 2017 03:02 #6

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How'd you get your boat on that stand?


builderdude wrote: 3M super duty compound, be careful it'll cut fast but does break down as you work it. Probably starts at around 1000 grit and ends up at around 1800 by the time your ready to wipe the haze off.

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2001 Bayliner Capri 1950 CL

Buffing the bottom....tips? 28 Aug 2017 03:06 #7

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It's quite the job removing the trailer from beneath the boat, I'd say buff everything you can get to while it's on the trailer. I purchased the 3M super duty from Wesco auto body supply.
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Dave
Edmonds, WA
"THE FIX"
'93 2556 5.7 Bravo II 2.0:1 18 1/4x19 P
.030 over-Vortec top end-part closed cooled
***The rebuild of my 2556***
www.baylinerownersclub.org/index.php/for...ansom-repair-my-2556

Buffing the bottom....tips? 28 Aug 2017 03:32 #8

  • Ridgedown
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Yellowing. Use a spray bottle (chemical resistant) and spray acme aluminium brighter A50. Do not dilute. Works like absolute magic in getting rid of the yellowing. Make sure you rinse with a lot of fresh water afterwards. No manual labour involved

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Buffing the bottom....tips? 28 Aug 2017 10:39 #9

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The only way to get it done right is to come to AZ and do mine 1st for practice. I will supervise and provide frosty-cold adult beverages.B)

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Buffing the bottom....tips? 28 Aug 2017 11:51 #10

  • RobMick
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Just spray toilet bowl cleaner on the hull.....I use the cheap stuff "The Works" from anywhere....about $1/bottle. Whatever you don't use in the hull you can use in your home! Anyway, you are wasting your time and putting a hurting on yourself in the process.....just spray the toilet bowl cleaner on with a spray bottle from the dollar store. Let it sit a few mins then rinse....repeat if necessary....be sure to wet your trailer and or drive way FIRST it is a very mild acid and it will discolor both.....(don't ask how I know),,,,

Your hull will be clean and ready to buff/polish/wax it you want within 10 mins....

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Hell, Michigan (yes we really live in a city named "Hell" in Michigan)
2012 BR 185 - 3.0 TKS
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Buffing the bottom....tips? 28 Aug 2017 12:52 #11

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Come on, really? It can't be that easy....or can it?

RobMick wrote: Just spray toilet bowl cleaner on the hull.....I use the cheap stuff "The Works" from anywhere....about $1/bottle. Whatever you don't use in the hull you can use in your home! Anyway, you are wasting your time and putting a hurting on yourself in the process.....just spray the toilet bowl cleaner on with a spray bottle from the dollar store. Let it sit a few mins then rinse....repeat if necessary....be sure to wet your trailer and or drive way FIRST it is a very mild acid and it will discolor both.....(don't ask how I know),,,,

Your hull will be clean and ready to buff/polish/wax it you want within 10 mins....

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Buffing the bottom....tips? 28 Aug 2017 12:53 #12

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Bwahahahahaha but that could be a good deal. Never been to AZ!

Jeffw wrote: The only way to get it done right is to come to AZ and do mine 1st for practice. I will supervise and provide frosty-cold adult beverages.B)

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Buffing the bottom....tips? 28 Aug 2017 14:53 #13

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Doubled50 wrote: Come on, really? It can't be that easy....or can it?

RobMick wrote: Just spray toilet bowl cleaner on the hull.....I use the cheap stuff "The Works" from anywhere....about $1/bottle. Whatever you don't use in the hull you can use in your home! Anyway, you are wasting your time and putting a hurting on yourself in the process.....just spray the toilet bowl cleaner on with a spray bottle from the dollar store. Let it sit a few mins then rinse....repeat if necessary....be sure to wet your trailer and or drive way FIRST it is a very mild acid and it will discolor both.....(don't ask how I know),,,,

Your hull will be clean and ready to buff/polish/wax it you want within 10 mins....


It can and is that easy. No need to kill yourself with abrasives when you have chemicals to do it for you. I used to use MaryKate On/Off, but that too is strong stuff (Oxalic Acid I believe) that will eat the galvanizing right off your trailer, not to mention what it will do to you your skin or eyes. I have never used toilet bowl cleaner but have heard good things.

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Buffing the bottom....tips? 29 Aug 2017 02:12 #14

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It's that easy.....try it. What do you have to lose....$1.00 and 10 mins?

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Hell, Michigan (yes we really live in a city named "Hell" in Michigan)
2012 BR 185 - 3.0 TKS
1999 Chaparral 233 Sunesta Ltd., 5.0 Volvo
1985 Harris Flotebote Classic 240
1993 Yamaha Waverunner III VXR
1993 Yamaha Waverunner III
1995 Yamaha Waverunner III GP
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Buffing the bottom....tips? 29 Aug 2017 02:59 #15

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Jeffw wrote: The only way to get it done right is to come to AZ and do mine 1st for practice. I will supervise and provide frosty-cold adult beverages.B)

HeHeHe send em to NC next. Mines so bad I'm gonna scuff and roll it blue again and bring the white on down to the "chine"??? ( Last vertical before turning under?

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Dave
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West of Hickory NC

Buffing the bottom....tips? 29 Aug 2017 03:04 #16

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Heard good things about on/ off. The marina that bought my c/c told me about it then showed me the ol girl. It looked like it's been recoated! They said though be careful and oven glove up. Also said very bad on galvanized trailers. Do small sections and rinse quickly and thoroughly, Hull and trailer.

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Dave
N.C. Boater, fresh and salt water. New to boating in 2011
1990 Sunbridge 2655 "One Particular Harbour"
5.7 Mercruiser Alpha 1 Gen 1
Past:
1995 SeaPro 210 C/C "Hydro-Therapy"
Mariner 150
Towing with:
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West of Hickory NC

Buffing the bottom....tips? 29 Aug 2017 04:52 #17

  • Mr. Darcy
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The chemical removal of the yellowing sounds like an easy way. For years the shop I worked for recommend against buffing or polishing the bottom unless a shiny surface is more important than good performance. A shiny boat bottom is slower than a dull one. Surface tension creates drag. People would pay to have the hull DA sanded with 320 so they could get about 3 to 5 miles per hour more speed without changing the prop or doing anything different to the engine. A little harder to clean if you don't have a pressure washer. two cents worth

Greg

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Newport, Oregon
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Buffing the bottom....tips? 29 Aug 2017 11:17 #18

  • Eyeman
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Mr. D - Greg, I've never heard that. Counter intuitive, a rough surface vs smooth. Hmmm?

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Buffing the bottom....tips? 29 Aug 2017 16:55 #19

  • Gtown
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My understanding is that a rough surface breaks the surface tension (suction if you will) of the water against the boat causing less drag. A rough surface shouldn't be confused with growth or anything else on the surface. Professional boat racers will often scuff the boat of their boats with sandpaper to increase speed. Personally I think it would be better to have a better condition (shiny and protected) boat that lasts longer then a boat that is fractionally faster and in worse condition. With that said my boat does have bottom paint because it helps prevent growth while sitting at the marina. If I pulled it each use I wouldn't have the bottom paint B) and would have it buffed and waxed.

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Buffing the bottom....tips? 29 Aug 2017 18:22 #20

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Eyeman wrote: Mr. D - Greg, I've never heard that. Counter intuitive, a rough surface vs smooth. Hmmm?


A golf ball travels farther because of the dimples. A totally smooth golf ball won't travel very far.

Ken

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Buffing the bottom....tips? 29 Aug 2017 18:26 #21

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Gtown said it well. What makes water "bead" up on a polished and waxed surface? Friction. In this case friction is often referred to as "surface tension" You could use a finer grit sand paper and get much of the advantage of the rough surface and have slightly improved appearance. Bottom paint will have the same effect on a planing hull as the sanding. Think of all the water that wants to bead on the bottom of a polished and waxed hull. That is a fair amount of friction. I'm not sure if that would be called induced or parasitic drag.

Greg

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Newport, Oregon
South Beach Marina
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Past work history: Prototyping, tooling, and repair for Reinell,. General fiberglass boat repair starting in 1976.
Also worked as heavy equipment mechanic, and machinery mechanic for over 30 years....

Buffing the bottom....tips? 29 Aug 2017 23:21 #22

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Thanks folks. I'm going to evaluate putting a Titleist ProV 1 finish on the bottom. :) :) :) That must mean my 2655 will do 325 yards off the Tee.

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Buffing the bottom....tips? 30 Aug 2017 01:29 #23

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Yea and three lakes over to the right....:woohoo:

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Hell, Michigan (yes we really live in a city named "Hell" in Michigan)
2012 BR 185 - 3.0 TKS
1999 Chaparral 233 Sunesta Ltd., 5.0 Volvo
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1993 Yamaha Waverunner III
1995 Yamaha Waverunner III GP
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Buffing the bottom....tips? 25 Sep 2017 14:32 #24

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A HUGE thank you for the toilet bowl cleaner suggestion. Last year I had the marina pressure wash the boat before winterizing it. The bottom was still dingy brown when I got it back. This season I pressure washed it myself (still brown afterward), sprayed it with toilet bowl cleaner, waited 10 min and hit it with the pressure washer again to rinse.....and it was back to being bright white. One more quick trip around to hit a few stubborn spots (or spots I'd somehow missed) again with the toiled bowl cleaner, and the boat looks nearly new.

A few observations. I'd suggest NOT using the dollar store brand. I started with a decent brand of cleaner and it was much thicker and stuck to the hull where it was sprayed. When that ran out I switched to the cheap stuff, which ran off quickly and consequently didn't work nearly as well. Maybe if it sat longer it would have worked better. Secondly, wear protective gloves and glasses. The stuff is nasty when being sprayed. Used about 2.5 bottles total on a Bayliner 175, probably would have been 3+ bottles just using the cheap stuff and about 2 total if I'd used only the good stuff.

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Buffing the bottom....tips? 09 Oct 2017 04:19 #25

  • Doubled50
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Did you use The Works then? Pressure washer or regular hose? I’m gonna try tomorrow, I’ve got just a few stubborn spots I must finish. Then I have to wax it before a long winters nap.

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