My napa sells Nason. I use Nason Ful-Poxy 491-10 epoxy primer/sealer and topcoat with Nason Ful-Thane 2K Urethane Topcoat.
Regardless of which products you use be sure to get specification sheets on anything you use. It's the instructions that should be on the cans but there isn't room because of hazzard warnings.
Also besure using a 2k urethane get a air supplied respirator. The hardener will go straight through a standard paint spray respirator. Even a quart of paint can hurt you.