Okay, bare with me, I'm a beginer with nobody around to help me.

I'm tired of my 1963 Caddy being primer gray. I was pretty much ready to do a rattle can job with John Deere Blitz Black just to get it all one color. However I've been doing alot of research through this forum and I realize the spray gun method is the way to go. So...how big of a compressor do I need?? They have some craftsman 3hp 5 gallon compressors on sale right now but is that not big enough??

I'm still in the process of prepping the car so I've got time but I just need to know what the best compressor would be.

thanks for the advice in advance.