Wasa, when you say you are redoing your cockpit deck, are you re-gelcoating it? painting it? etc? If you are re-gelcoating, I would try the gibco flex mold as that technique will last forever and never peel, etc. Another way you can do the gibco flexmold is to lay it out on a large piece of glass (glass is extremely flat and smooth), brush the flexmold with gelcoat and let cure, lay up 1 ply of fiberglass mat and polyesther resin on top of the gelcoat and let cure. sand the fiberglass well to prep for bonding and then remove the flexmold from the laminate. Lay the laminate on your deck or make a pattern with thick paper and cut the laminate to the proper dimensions. Then epoxy the entire premolded nonskid laminate to your deck, which you will also have to sand well to prep for bonding. Yes, quite a bit of work, but you will get that diamond shaped non-skid and you can power wash, scrub, etc. and it will never peel.