Well, as most of you know, I'm still in "rookie" status with my new hobby. I came across the issue of coating my molds w/epoxy. Made the mistake of buying a cheap pack of brushes from one of those dollar stores. Went to coating w/un-thinned 5 min. epoxy. Yea, disaster struck quickly...
The brush started shedding bristles at an alarming rate , causing me to pick them out of the super-quick setting epoxy and waste valuble time. I don't know why, but I quickly crammed the brush in for another dip of epoxy (thinking I had time for one more mold) and promptley ruined the mold's ridges with a couple ultra-thick swipes of the curing glob.
Thanks to help from this site I found some 30 min. epoxy and thinned it ever so slightly with 91% rubbing alchohol (thanks, guys). I stayed away from the brush though, and went with a 1 inch foam brush.
I used more of a "dabbing" instead of "brushing". What the foam does is soak up some of the epoxy while laying it on, resulting in an evener coat of epoxy with no chance of those nasty runaway brush bristles.