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What do members do to repaint.... especially after multiple seasons with 2 plus coats applied each year?

I see what seems like little to no effort to sand / remove the pain before repainting. And this results in build up of a thick layer which can scale off in patches and so forth. Essentially what seems to be taking place... I am not watching obviously... is the bottom is power washed and then over painted and the boat is splashed.

I hear advice about applying 2 coats of paint... non ablative... in my case. I am not sure I understand the wisdom of that... or how the paint below the surface would assist in anti fouling. YES if the paint softens and the antifouling agents can migrate to the surface. If not I don't get it? And how long before all those agents would be "used up? And how can one tell? Is that even possible?

I have had Shiva for 33 years and done a lot of bottom paint jobs, myself and done by the yard. Crappy yards will do the work when you are not around to observe and will simply power wash and paint... Better yards will wet sand wash and paint. Almost every paint companies (varnish as well) have specs for surface prep and often includes sanding.

If you haul out every year... perhaps one coat is better than 2? or better than 2 coats for 2 seasons?

Regardless, I find that where I moor... no bottom paint seems too effective... and one has to dive the bottom and scrub the bottom.... So if you are doing THAT regularly... does 2 coats annually do better than one? I now have a diver about one a month... I am using Trinidad.

Bottom paint is WAY too expensive and not healthy for you or the environment. Something will change. It has to.

What is your experience and recommendations?
 

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colemj;2051342034 The PO of our boat used hard paint for many years said:
I did the soda blasting back in 09 and have been only doing one coat. Bottom has very few barnacles... but a fair amount of growth if not removed by the diver. I don't do the bottom work for multiple reasons... I have yet to learn how the new yard does them... I'll find out. I suppose I could hire someone to wet sand if they don't but i am sure they will do it for $$. They don't like to thin the paint I found.
 
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