I have recently had the hull
soda blasted. The good news is that 500# of bottom paint
is not in a landfill somewhere and will no longer be dragged along with the rest of the boat.
The bad news is that the blasting punched through the gel coat and requires a bit of fairing. Apparently there was so much paint
on the hull
(25 yrs worth) that the blaster couldn't maintain a light touch. Not a single
blister though so that's good news.
With the gelcoat
breeched by the blaster dime sized dimples a barrier coat is in order. I hadn't intended this if there were no blisters
but now I need to provide a barrier and will bite the bullet and use an epoxy
But I can apply it to the cleaned hull and fair our the dimples etc after or before the barrier coat or both, or between coats as I'll do at least 2.
fair after, before or between barrier coats?
What sort of fairing would be recommended under barrier coat and over barrier coat?
My instinct is to fair under and not attack the barrier with sanding
as ... perhaps it could be sanded through.
I might be able to use a cheaper fairing since it's sealed inside the epoxy
barrier coat. Outside it would have to be underwater spec.
How smooth does the barrier coat go on and what sort of roller is best?
Do I need extra coats on leading edges? It's not a wear surface as it will have ablative paint
over top so that seems not required.
Tips please on barrier coating. This weekend I will be ready to fair or barrier.