ive gotta recommend vertex. Talk to Doug directly. Gave me an awesome
deal on a blem and i live 20 minutes away so i was able to bypass the shipping. Ive done a full resurface, on a no mercy, black widow venom, and cleaned up my virtual gravity with no problems so far. ive got the 1/2 but he told me the 1/3 would have been plenty. Anyhow, best of luck no matter which way you go.