I've been experimenting with duracoat and if there was one thing that I'd suggest to you is to use the duraBAKE that comes in the aerosol can. Of course this one has to be baked which may not be an option for you but for initial ease of use it's superior to duracoat. With duracoat you're mixing hardener in a makeshift aerosol delivery system (Preval)(or airbrush if you so choose to buy one). The mixed life is ~8 hours so you have time to work. Also, if you think you need four ounces, order 8. The sprayer doesn't pick up all the product in the bottle and you'll need more. The sprayer (Preval) doesn't work at too many angles so you have to arrange your stuff in a way that you can spray it without having to point it up/down. You don't want to run out and then have to mix another batch and chance having a difference in the color tone because you mixed two batches. Mix one big batch, spray, throw away the excess.
Clean clean clean your parts, I tossed mine in the dishwasher on the pots and pans cycle (be sure to run it again empty before you go back to use for dishes). The actual application I think was straight forward and easy.
Strip your weapon all the way down or tape off parts that shouldn't be coated, duracoat will significantly changed a close tolerance or fitted part so much so that when you go to reassemble it it won't go back together because the part is now thicker.