If your resin is the consistency of honey, then you are just fine. It will start to get clingly and gloopy as the resin starts to "go" or kick. Once is starts turning to gelatin - it's a done deal...don't bother working with it.

Chop mat is that way, that's why I use knytex and cloth for everything.

Now, if you want a hint, what you can do is apply your mat, making sure you get plenty of resin on it. I wet out my pieces before I apply them - brushing resin on fiberglass material is impossible IMO.

After you get your pieces down, get a metal fiberglass roller, put down an additional layer of mat dry. Then roll the matt over the previous layers, compressing them. It should soak up any extra resin, and you will have a cleaner piece.

I'd love to work with UV resin, but I've never tried. two great places to shop are:

http://www.shopmaninc.com
http://ww.tapplastics.com