Sail Drive Antifoul

I would agree with maby on Harry's question. I would not sand back to bare metal unless you have to, you are only looking for a key.
 
Trilux recommend abrasion then prime with Primocon, but I wouldnt interfere with the factory finish, just degrease with thinner and then apply primer.
 
I seem to recall just rubbing over with a heavy duty scouring pad just took the shine off without any damage to the paint, but it was a few years ago.
 
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