Chris,
My acraglas kit came with brown and black dyes. I don't think it would have an effect. It's part of the deal with gunsmiths to color the stuff before using it for glass bedding.
Justin,
Thanks for the offer. Chuck doesn't like me any more I guess
. Fitzo sent me West Systems Epoxy for free! I had to pay for every thing else. Don't worry about it, most of it I'll find uses for around the house.
FWIW, last night I prepared a new test bar. I ground everything off with a worn 50 grit. Then sandblasted the bar. Then went back to using C clamps to reduce the glue line. I still want an adhesive that holds well but doesn't leave a line.
Steve