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Catalina/Capri 25/250 Sailor's Forums

General Sailing Forum

Stripping Bottom Paint

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Rich G
Navigator

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226 Posts

Initially Posted - 12/05/2006 : 10:41:19

Unfortunately, I think it's time to strip the bottom down to bare fiberglass. There are areas where the paint just keeps chipping off the bottom each season and the layers are pretty thick.

For those of you who have used the WM Peel Away Marine Safety Strip, how much is needed for our boats? Is one gallon enough? Two? Five?

Then I guess I'll need to figure out what will go on in its place . . .

Rich

Cerberus
Hull #4695
1984 SR/FK No Pop-Top

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 12/05/2006 : 12:03:53

Once you are done switch to VC-17 Plus, you will NEVER strip again!!!!

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djn
Master Marine Consultant

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USA
1561 Posts

Response Posted - 12/05/2006 : 12:24:17

To add to Franks suggestion, you should put on a coat of barrier protective paint first.....I don't think VC17 does that. Cheers.

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Nautiduck
Master Marine Consultant

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USA
3704 Posts

Response Posted - 12/05/2006 : 14:17:18

5 gallons and I have an unopened one for sale. Find the best online deal and I will sell it for 50% of that plus shipping. I bought it for my C22 and then bought a C250 which doesn't need it.

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dblitz
Navigator

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240 Posts

Response Posted - 12/06/2006 : 18:28:58

I understand that barrier coats only need to be done once. Is that true?
If true, and since I have info that a PO had a barrier coat put on, how does one strip the ablative paint off without damaging the barrier coat. I hesitate to use scrapers, etc.

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triley
Captain

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USA
251 Posts

Response Posted - 12/06/2006 : 19:03:32

I didn't understand. If you have 5 gallons and it is Peel Away 7 I will take it. I think i can buy 1 gallon for about $66.

Tom

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Nautiduck
Master Marine Consultant

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USA
3704 Posts

Response Posted - 12/06/2006 : 19:42:23

Tom, see my post in the Swap Meet section. 5 gallon bucket of Dumond Peel Away Safety Strip. This is the stuff that will peel off all paint, including anti-fouling and barrier coating, to the gelcoat. It will not harm the gelcoat.

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Steve Milby
Past Commodore

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USA
5902 Posts

Response Posted - 12/06/2006 : 19:49:39

<blockquote id="quote">quote:<hr height="1" noshade id="quote">...how does one strip the ablative paint off without damaging the barrier coat. <hr height="1" noshade id="quote"></blockquote id="quote">

I haven't used WM Peel Away Marine Safety Strip, but have used other strippers formulated for fiberglass, and the paint strippers I've used will remove both antifouling paint and barrier coats. You said your bottom paint is an ablative, and the general idea of ablatives is that they aren't supposed to accumulate over the years, so, in theory, you shouldn't have to strip them off. You put on one coat of blue paint and two coats of red, and when the red erodes enough so that the blue starts to show through, then you give it a light sanding and apply new bottom paint.

Is your bottom paint chipping and peeling over a widespread area? If so, it might be that the PO started applying hard finish epoxy paint after he barrier coated it. Then, after there was already a heavy accumulation of non-ablative paint, he might have started applying an ablative. If that's what happened, there's probably no way to strip the old antifouling without also stripping the barrier coat.

The only alternative I can think of is that, if you're not interested in achieving a pristine bottom, for racing, you might be able to sand off enough of the old paint to get it smooth enough for ordinary sailing and cruising purposes.

If you want to prep it for racing, you'll probably need to strip it down to the bare fiberglass and start over again. The only consolation is that, if you use only ablative in the future, you should never have to do it again.

Edited by - on

Captain Bill
Navigator

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USA
148 Posts

Response Posted - 12/07/2006 : 20:16:38

When is the cayenne pepper is used? Understand it acts as a preventative for salt water marine life, ie. barnacles. A post here some time ago indicated that a boat was removed from salt water after several years without treatment and had no barnacles. Just curious as I'll probably have mine painted early next spring.

Thanks, Bill

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Dave Bristle
Master Marine Consultant

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Djibouti
10005 Posts

Response Posted - 12/07/2006 : 21:32:01

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by fhopper@mac.com
 Once you are done switch to VC-17...<hr height="1" noshade id="quote"></blockquote id="quote">
In salt water?

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existentialsailor
Master Marine Consultant

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USA
1180 Posts

Response Posted - 12/08/2006 : 04:33:10

VC17m-fresh water
VC17m Extra-low fouling salt water (ie. cold).

I only got barnicles on my transducer and one area where the VC17 had worn off to the barrier coat.

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dlucier
Master Marine Consultant

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Virgin Islands (United Kingdom)
7583 Posts

Response Posted - 12/08/2006 : 11:58:09

VC Offshore is a high strength antifouling paint with Teflon® for use in saltwater. It yields a hard, very smooth finish for maximum durability, reduced friction and increased performance.

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existentialsailor
Master Marine Consultant

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USA
1180 Posts

Response Posted - 12/08/2006 : 13:15:48

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by dlucier

VC Offshore is a high strength antifouling paint with Teflon® for use in saltwater. It yields a hard, very smooth finish for maximum durability, reduced friction and increased performance.
<hr height="1" noshade id="quote"></blockquote id="quote">

Yes, but what you have to do to get it off after a few seasons and it's horrendously expensive IMO.
I saw boats hauled at the same yard as mine was and the one that had Offshore didn't look any better than mine.

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 12/08/2006 : 14:06:23

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Dave Bristle
 <blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by fhopper@mac.com
 Once you are done switch to VC-17...<hr height="1" noshade id="quote"></blockquote id="quote">
In salt water?
<hr height="1" noshade id="quote"></blockquote id="quote">

I would try it! Worse case is at some point you haul, power-wash, and put something else over it.

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Gloss
Master Marine Consultant

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USA
1916 Posts

Response Posted - 12/09/2006 : 09:07:52

I plan on refinishing my bottom sometime next season (no, I don't mean roids)
I'll probably use some kind of chemical stripper as I hate ablative dust when sanding, even though I use one of those really good 3M respirators.
So what should I use for a barrier coat? VC tar, or the Interlux 2000 (I think that's the right number) or both. I want to do the best, most time efficient job possible, and will spend the extra bucks so as not to do it again for a while. How about multiple coats of VC 17?
I have my boat slipped in fresh water where we get mostly slime from algae and red clay here in Knoxville. I trailer once a year to the keys for 3 weeks, so barnacles aren't an issue.

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Frank Hopper
Past Commodore

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Pitcairn Island
6776 Posts

Response Posted - 12/09/2006 : 12:44:12

Has you bottom ever been sanded? If not I would avoid it. My boat has no blisters and the factory bottom has never been violated. I do not use a barrier coat, just 2 coats of VC 17. Interlux sells a no sand prep for the first coat ever, after that you just paint. If your bottom has been sanded and/or have blister issues then you are on a longer path.

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Gloss
Master Marine Consultant

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USA
1916 Posts

Response Posted - 12/09/2006 : 18:54:31

Frank, I'm sure my bottom is just as smooth as yours.

The 89's have a vinylester resin hull resistant to blisters. But I'm sure that you already knew that.

I think I'll study the interlux guidebook really hard before I start the job. I'll follow your advice and go with at least two coats too.

I wonder what the VC tar is good for? I guesse I'll find out.

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John Russell
Master Marine Consultant

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USA
3444 Posts

Response Posted - 12/09/2006 : 19:49:21

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Originally posted by Gloss
 Frank, I'm sure my bottom is just as smooth as yours.

<hr height="1" noshade id="quote"></blockquote id="quote">

Some things we just don't want to know.

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Steve Milby
Past Commodore

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USA
5902 Posts

Response Posted - 12/10/2006 : 06:06:31

Frank, it's hard for a DIYer to apply barrier coat smoothly enough for a good racing finish. Racers often use VC Tar instead of barrier coat, because it produces a much smoother finish.

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Mark Maxwell
Captain

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USA
329 Posts

Response Posted - 12/11/2006 : 16:07:53

Here is an interestng article about Barrier Coats http://www.epoxyproducts.com/barrier4u.html

I used the two part epoxy and it went on very smooth.

Only draw back was the work time. You have to plan for small areas at a time and work quick. I sail in mostly fresh water with a sea trip here and there. So far no problems, it looks as good today as it did 3 years ago, even with trailering, and I have no anti fouling at all. It only sits in water (fresh) for 4 months and then it's trailered. Algae forms but is easily washed off each season. I would not leave it in salt water, for long, without anti fouling.

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Nautiduck
Master Marine Consultant

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USA
3704 Posts

Response Posted - 12/11/2006 : 17:11:19

Mark, sweeeeeeet! Nice job. I used that same outfit for some penetrating epoxy to repair a deck delam on a C22. They are a good outfit.

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