I used west system and was happy with it. I think they have been around the longest. Each brand has diffrent thing they are kind of known for. MAS make a low viscosity epoxy. I think what will help you the most in getting a nice glass job is putting a sealer coat of epoxy on before glassing and only laying one layer of glass at a time. It's extra steps but it make each step easier and usualy turns out better unless you have done a lot of glassing before.

Are there any differances between West Systems, System III or MAS epoxy
: resins as far as cost, ease of use, clarity, durability?