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.
Cheers,
Jim