I'm about to test some parts made from prepreg material and I'd like to produce our own prepreg similar to the method in David Algie's now famous video. If I understand correctly, I can obtain a b-stage cure with our existing array of epoxies and vinyl ester resins simply by changing the catalyst??? Can anyone using this method of DIY prepreg production recommend a good epoxy and catalyst to use?  

Maybe think in terms of a finish that will assist any durability issues (on the outside at least), a marine polyurethane clear coat (durpox or similar) will aid with scratch resistance. The rest of it is down the resin and layup