: As an aside, I can offer some research that few builders get to do, and it
: relates to discoloration of varnish and epoxy in a "controlled"
: environment (Hey, stop chuckling) . . . My kayak has seen very little UV,
: but the finish is darkening everywhere but under the straps and rigging. I
: suspect it is air more so than UV that causes that phenomenon. It is not
: severe, but quite noticeable when the rigging is removed, FWIW . . .

Hi Spidey, Is it possible the discolouration is from flourescent lights? They don't put out much UV but they do put out a little (I think), maybe enough that over a time span of years some darkening is noticed? Just a thought.

Bryan