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Anti foul renewal

781 views 4 replies 4 participants last post by  A exall 
#1 ·
Got my boat out of the water to scrape the barnacles off and renew the anti foul and in places all the old anti foul has come off leaving patches of bare hull showing.
Do I 1./ try and remove everything and start again; 2./ just put 2 coats of anti foul; 3./ do something to the bare patches then 2 coats of anti foul?
Always been a trailer sailor so not had this issue before.
Thanks.
 
#2 · (Edited)
The right way to do it would of course be to remove it all, key properly, then prime and repaint.
However, that is one hell of a job, so in your shoes I would sand the affected areas (wet sanding is best - protect yourself) until each patch is nicely feathered off, then prime with the recommended primer for your chosen antifoul, then clean and key the ‘good’ paint over the rest of the boat and add two overall coats of antifouling over the whole underside.
 
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