may be too late, I am no expert (I have painted 2 frames one rattle can and one automotive paint) Auto paint is hugely more durable

I did a lot of research and it suggested that an acid etch primer first coat (rattle can from autopaint) will help end result longevity, followed by sandable primer, then color, then clear

I don't use spray paint of any kind without out a basic 40/50 dollar mask with replaceable filters