> So what exactly is the "right roller cover" and how
> do you use it?

when you order your epoxy, do yourself a favor, order roller covers and mixing pots from the vendor. They arent any more special than the stuff you can get at any marine supply house but it is *really* nice to have all the stuff at once without running around.. The roller covers in question are yellow foam about 3/16" thick, I cut them in half and use them on a three inch roller handle. There is no reason to use a whole one all at once. If I remember they are about 3 bucks per. Dont be tempted to buy roller covers at home depot or some such home supply center...either order them with your poxy or get them at a boat supply dealer