The problem I found is you need a resin that doesn't shrink as it cures, that is not brittle, and will not wear. It may be out there, but none have all of the requirements that are perfect in all requirements. Alumilite is close, but be careful with it, it is nice because it doesn't smell, but the fumes are still dangerous. There are other resins on the market, I would start by asking the companies what they would recommend.
Marvin