Hey Les,
YEah UV definatly afects the epoxy and quickly. Your right the dregs you find in the cup you used inside are ussualy clear and the hot stuff on a sunny day is ussually yellow. ITs true for Rakka nd the MAS I use
In the end, I sort of think it all comes together in the sun eventually anyways. After putting many coats of varnish on a boat a summers use ussually will even everything out even the Epoxy under it. So I think its probloby a bit of a wash.
Having said that I still think its best to do your work indoors if ya can, but on cookers like this one..... Hey I'm out side. I got to bottle as much of this as I can for Febuary. 
I'm in photon absorbtion mode today. I am fixing a deck cleat on my GE and working on an Eric hybrid.
If it gets any hotter I may pull it all inside into the cool, of my shop but its nice to listen to the locusts.
!RUSS
