Had a question about the best way to approach painting the black sections on the speaker, top, and back areas of a pacman cabaret (or similar cabinets)

I'm building a couple of duplicate cabarets from scratch using 3/4" birch plywood
And yes I know that's not a pacman CP


I tried priming with a aerosol filler primer, sanding and painting with a semi-gloss aerosol paint. I don't really like the sheen and it shows a lot of scratches and blemishes.
How are you professionals doing it when you restore these cabinets? I'd like it to look showroom new and have to get some sort of process nailed down.
Roller, spray?
Pics would be nice and helpful if you have them