Epoxy or Urethane High Build... what's next for me?

I bought a Devilbiss Tekna Prolite gun to do finish work with. I bought it on the recommendation of another member here, and it is an excellent gun! It makes me look like I almost know what I'm doing! LOL. I think it is the 703556 version that I got. I got 3 different tips and 2 different caps. Watch, and they will go on sale every now and then. I bought mine off Amazon for $440ish. I sprayed SPI epoxy primer mixed as sealer a few weeks ago, and it layed it down great.
https://www.amazon.com/dp/B007N6FFKO/?tag=fabo03-20