Join Date: Sep 2005
Location: New Westminster, BC
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Re: Yet another bottom paint question, now featuring picture
You're looking at paint layers.... the blue is definitely older antifouling, the white could be barrier could be gel coat. DO NOT fill/fair with a hard filler. First of all it will be on top of old paint and if you're lucky it won't stick... if it does stick you'll have created a 'high spot' that shouldn't be there.
The proper thing is to take it down to gel/barrier and see how smooth/rough the actual hull really is. Big, ugly job but it will need doing at some point. If you simply can't get to that now, then sand/feather the area to get rid of the obvious edges and repaint for now. But at some point you'll want to bite the bullet and start fresh.
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)