That's a good question. I chose polyeurethane as a finish because it's much tougher than other finishes. I may experiement with epoxy. System 3 mirror coat is something I used many many years ago for a project like this but it was too long ago to remember much about it other than it went on very thick and looked great when done. Can't remember if I had problems with drips or anything. A lot of guys have been experimenting with brushing on epoxy and then slow turning the piece with a rotisserie motor and getting fantastic results. That may be the way to go.