First, welcome to the club! Good to see you here..

Next, Yep.. You're nuts!

I can't even picture what you're wanting to do! I can't figure out how you're going to use air pressure to push in paint plus use air to atomize that paint...

At least around here you can rent a pressure system for painting.

I'm certain with enough time effort and money you can accomplish this... but it's probably cheaper to visit harbor freight or northern hydraulics.. IMHO!