Thanks for the help everyone.
Having worked in the Gravure print industry for too many years I'm well up on most Solvents, and would not want to lay under my RIB using loads of Acetone to remove the Antifoul, I'd probably pass out first before slowly dying.
I'll get down to the chandlers at Port Solent at the weekend to see what they have, at least I know the names to look out for.
The Gel type that I can pressure wash off afterwards sounds good.
RIBBED For extra pleasure.
Member of the ebay Blue RIB cover club.
Member of the Bombard 380 Aerotec club