I used TCP Global's DTM Epoxy Primer/Sealer

pdf tech sheet

I have never used it before as a primer, but did use (white) as a sealer prior to topcoat and thought it had good hiding properties over dark grey primer.

I've also never sprayed over red/orange before, so this truck is a bunch of firsts for me wink

Truck is going to be light yellow so i do need to halt the bleed through...from sanding and inspection, I do not see any reason to be concerned about adhesion.