So I'm looking to get an air compressor for a friend who has helped me an insane amount over this past year with the bike and other vehicles. Mainly just by letting me use his garage to store and work on things so I'm not outside. lol Anyway, the one thing his garage is missing is an air compressor. I don't know much about these other then they compress air and allow me to use air tools, which would be helpful! I also want him to be able to use it for painting purposes as well. Would just any air compressor do, or how much psi does one need to do things? Any information would be helpful.