Epoxy primer

Since my post has been resurrected here is an update. I have been priming as work progresses and using PPG CRE epoxy. Weeks and even months later it sands beautifully. Sprays nice with a 1.7 tip and is very thick. I plan on using CRE for hi build as well for final blocking.
Reasonably priced and allows the use of one primer product start to finish!