Take a razor blade and cut some crosshatching into a sample area, soak it with lacquer thinner for a few minutes with a rag, dry, then try to lift
with some masking tape. If the paint
it is well applied and is suitable as a base coat.
If it passes the adherence test, I would sand with 220, repair/fill any gross deformations, and coat same with Awl-Grip 545, then paint as you want. FWIW, two guys can roll and tip Awl-grip into a "ten foot" paint job (from more than 10 feet you can't tell it from a professional spray-booth job)... That said, dark colors are the most unforgiving to inadequate prep/fairing/sanding underneath! YMMV!