YES ... epoxy after blasting...I use SPI so what i write applies to that...PPG is OK as well,,but I've heard from a few they prefer transtar epoxy over PPG
Metal work ,blast possible more metal work,,epoxy.
If your ready for any filler work apply on top of epoxy in the epoxy recoat window usually wait 24 -36 hours and upto 5-7 days after that you would have to scuff re shoot area and apply filler ,,,after sanding and happy with all filler work reshoot epoxy ..this is where you could either block sand and prime and block and prime with epoxy Or could use a 2k or high build primer and block as needed {but if you go that route don't put filler on top of 2k or high build}
once all done blocking to your liking then apply epoxy as a sealer then SS or BC/CC