Wow glad I asked . Didnt realize they had gloss and medium. I am going to use epoxy primer first then paint . Do they recommend the hardner or is that optional?
The hardener makes it dry a lot quicker, makes it a lot tuffer. If you get a run in the paint you can sand it out and recoat it the next day.
Without the hardener it is more gummy, can wrinkle if you recoat it before the recommended dry time (days). Just all in all a lot nicer to work with when you use hardener with it, gives you more options if problems turn up.