massive reconfiguration time again.

I'm gonna use spi epoxy. Do I have to strip it down to bare metal entirely? Or can it be sprayed over old primer and paint? The primer is old red lacquer primer. It's so damn tough I can't sandblast it off.
Just sand it clean and smooth, 400 grit.
Shoot a small area and see if it lifts.
Prep is where paint is.