We used Interdeck on our cockpit sole after removing aged glue-on non skid which left smooth gel coat behind. Once the glue residue was scraped away a light sanding was all we did. Two seasons later it looks good and grips well.
".. 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)
1984 Fast/Nicholson 345 "FastForward"