Unfortunately it's been discontinued, but if you can find some old stock of 'Ultimate Sole' that's the way to go. It's a nice glossy varnish that does NOT get slippery when wet.
A great product and it's loss is a big one.
1984 Fast/Nicholson 345 "FastForward"
".. 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)