I've wondered this myself. Is the UV inhibitor needed to protect the epoxy from breaking down, or to protect the wood from discoloration?

> My Guillemot Expedition Single is seaworthy. I have had her out
> in the Gulf at Pensacola several times, and here in New Orleans' Lake
> Ponchatrane. I am not satisfied with the finish
> on the epoxy as of yet. I therefore have not as of yet placed the
> first coat of marine varnish. My question is, am I doing any long
> term harm to my kayak by using her prior to varnishing?