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Triton View Drop Down

Joined: 20 May 2016
Location: Rhode Island
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    Posted: 20 May 2016 at 11:29am

I have a 1962 Pearson Triton sailboat. I have stripped off all the bottom paint and am trying to work up the 'perfect' system to re-coat it as good as it can be. The gelcoat is crazed equally everywhere, but there are no blisters at all. A few years ago I refinished the topsides using Awlgrip 545 primer and Interlux Perfection. The topsides were the exact same crazed condition. I faired the whole topsides with  West System and then squeegeed 545 into the exposed crazing. 3 years later there is absolutely no crazing showing through on the topside. Even just below the waterline where I have sanded up to that primer, the primer is absolutely perfect over the crazing. I would like to the results on the bottom to be as good. 

So, a couple questions: 

Do I need to do a barrier coat if there are NO blisters? The hull is literally 1" thick solid fiberglass. 
Could I use the Awlgrip 545 again under the antifouling paint? Another primer? (I haven't decided between VC Offshore or Pettit Vivid as my antifouling. I clean the bottom once a week and I like the idea of not swimming in a cloud of paint every week.)

I have some fairing to do on the bottom. What is the correct sequence? Primer/fairing/primer/antifouling? Or fairing/primer/antifouling? 


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BoatNut View Drop Down

Joined: 29 Jan 2011
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Post Options Post Options   Thanks (0) Thanks(0)   Quote BoatNut Quote  Post ReplyReply Direct Link To This Post Posted: 23 May 2016 at 10:27am
545 can be used below waterline if you choose.  More typical would be Interprotect 2000e barrier coat primer which will fill crazing, sands (fairs) nicely and provides an excellent basis for bottom paint.  Its not just for prevention of blistering.  If you are going to clean the bottom every week I wouldn't use even a good ablative like Vivid, you'll wear it off.  Go with a hard (modified epoxy) paint like Ultra or Trinidad if you need good anti-foul capability or the VC if you don't.  As far as repairs and fairing are concerned do all that first.  Whatever primer you use give it a good scuff before applying bottom paint or hot coat it.

Edited by BoatNut - 23 May 2016 at 10:31am
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