: From what I can tell, this stuff shouldn't need refinishing for a few years.
: I would imagine that you could varnish over the top if you want to.
: There's a rule of thumb I read here that you shouldn't put a harder
: varnish over a softer one, but there shouldn't be any varnishes that are
: harder. If there were, I'd be using them instead.

Does the moisture curing one part urethane have as high a UV rating as the two part?

Does anyone know if the one part urethane is isocyanate free,it seems like it would be and therefore much safer to use?

Does it require any special conditions to use it effectively such as low humidity to prevent too fast a cure . Does the manufacturer recommend roller application or spraying etc?

How many coats are required if you roll it on or spray it?

Even at $100 a boat it would seem that either of these urethane products offer much better UV and scratch resistance to any varnish on the market and the way it holds up on cars is amazing. Automotive paint jobs used to fade badly before the introduction of this technology.