[Birdguy]

Personally, I would never paint a car that someone else has done the body work, primer, and surfacer on proclaiming it to be "paint ready" and take it for granted that it is, indeed, ready for paint. That is a sure-fire recipe for disaster.

My last job was on a '66 Corvair convertible that the owner had done extensive body work on. He tried every body shop within a 200-mile radius to find someone to finish the job, and nobody would touch it. All they are interested in is quick in-and-out insurance work. We happened to meet at a local cruise-in and worked out a deal to follow the recipe described below. Although he did a decent job at body prep, I still spent 100+ hours getting it "just right".

The first thing to do would be to sand it and prep it for another coat or two of sandable primer compatible with the color coats to be applied.

Next step is guide-coat and block-sand every square inch until it is perfect. If more sandable primer is required then rinse-repeat.

Only then would I consider "waving a paint gun around", and it would only be with a high-quality paint such as PPG Concept or the equivalent. Why? Cheap paint is just that, cheap paint. When it starts to deteriorate due to heat, cold, and UV exposure, folks will only see a crappy looking result. I can't speak for everyone, but I do have a reputation to uphold.

Bottom line: MAACO for the OP