I've never heard of non-skid sections on the topsides. AFAIK
the topsides are the sides of the HULL above waterline, not the deck. If someone below says such-and-so "is topsides" yes, that means they are on deck--but they are not on the topsides unless they are rapelling down the side of the boat.
Non-skid sections can and should be waxed to prevent oxidation, just like the rest of the FRP boat. The difference is that you use a non-skid wax on the non-skid sections and the deck in general. Yes, there really are such things, the label will tell you if you've got one.
In theory polishes are more durable than waxes, but as to carcinogens and such...heck, even the common solvents that were used with organic waxes thirty years ago probably still require a solvent and carcinogen warning label. Personally I'd rather use a simple good wax than a miracle product, but 3M's professional lines of FRP treatments are also pretty good stuff. Just don't go huffing the bottle.
Rubber gloves? Yeah, probably a good idea whenever we're using "stuff" these days.
Doing it Halekai's way, the old fashioned way with premium waxes and elbow grease amplifiers, still produces a final result as good as anything else that's ever been invented.