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can anyone gove me advice on aplying antifouling on a bare hull?
It's getting nice weather in holland so i'm working hard to get the boat ready for this summer.

The whole hull has once been repainted in a greyish colour without proper under-water properties.
This resulted in the under-water part giving "baby" osmose: Only treating the paint not the gel coat.

The waterline has been sanded down to a very fresh and clean gelcoat.

What's the best way to apply a new layer Anti fouling?
Should I use a 2 component base coat? or should i just apply it on the sanded gel coat?

Let me know
cheers

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When I was a kid and painted bottoms at a local boat yard, I applied a primer coat to the bare gel coat before applying the anti-fouling paint. I'm not sure how it is done now a days as it's been more than 30 years since I worked at that boatyard.

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Apply a barrier - like Interlux Interprotect 2000, then lay on the antifouling paint. Interprotect will help reduce blistering of the gelcoat, and it's a great primer.

Cliff - I did bottom jobs when I was in High school 20 years ago. Think of what OSHA would do now if they saw a 16 year old in a t-shirt and jeans with a paper mask sanding off a few layers of nasty anti-foul!

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You wore a mask? No one told me about a mask back then....lol. All I wore were some cut off jean shorts and a pair of flip flops....... It was not fun at all. Many times I had to literally scrape off the barnacle beards that were on the bottoms of these boats that were kept in the salt water without anti-fouling paint. I guess the only folks the at boat yard that were gullible enough to hand scrape those things off were kids like me. Lol.

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That's a coincidence i worked at a shipyard as well! nevertheless procedures must have changed simce then it was 10 years ago...