West System for the epoxy. It's not really going to matter which hardener. Even the 205 "fast" hardener is slow compared to say a 5 min epoxy.
I've used mixol universal tints and transtint dyes with success. A little goes a long way with either.
I'm not concerned in the upfront cost really, I'm more concerned on the placement of the antenna. Our house is two story, so running one into the attic would be an ordeal. Putting an antenna outside, even a relatively small antenna, is just sooooo 1980. I figure I'm only about 20-25 miles from downtown STL, so I probably have more flexibility than most.