I don't know how you use your dinghy
, but if you are a cruiser making a pretty, shiny, slippery sole for it is a bad idea IMO. We carry lots of crap in our dink, we track sand, mud, shells, rocks and other materials unfriendly to varnish into the dink every day. Propane tanks
, anchors, other heavy and hard items get tossed in to a heaving dinghy
... you get the idea!
So, if I had a dink with timber floorboards, I'd be looking at epoxy
sealer followed by one of the water-based industrial walkway "paints". These are extremely durable, have unequaled non-slip grip and are inexpensive. Kiwi Grip is a similar product with the price
elevated to reflect its "yacht quality" status. We've used one called "Sports-Cote", available here in Oz, costs about ten bucks a litre. The drawback to these products is their frankly industrial appearance, but to us this is a minor thing. YMMV.