I had my car done about 15+ yrs ago at Maaco. I removed the grille, lights, fillers, etc. I could have prepped it a little better, but the actual paint job came out pretty decent. I had overspray on the glass, tires, etc. which I had to clean up myself.
I did cut corners in the body work, and of course it showed afterward.. :?
They used a cheap Dupont acrylic enamel. I gave them the fillers to do, but they didn't do them. They handed them back with a quart of paint. I ended up painting them myself along with the rear air deflector.
This time I'm painting it myself with single stage urethane. I'm hoping for the best. :wink:
Maaco shops are a franchise, so the level of work varies from shop to shop. If you do most of the prep work yourself, and pay for better paint, you might have good results like the '80 Malibu pictured above...which looks really nice.
They certainly didn't use sealer on mine. They did a quick scuff and off it went to the spray booth.