A friend of mine found a brand new Graco 10,000 at a pawnshop (no, not a typo, a 10,000!), that was ruined--Or so the shop owner thought. My buddy paid around $300 for it, took it to a machine shop and mechanically cleaned the
epoxy out of it. The only thing that he had to replace was the gun...
The 10,000 is a double dip, 7 (I think) outlet pump...Needless to say, his production went WAY up...
No, I would never chance putting epoxy through a spray rig of any kind...