I painted my Craftsman lathe with auto paint. I wanted to match the sparkly green that was already on it, and there was nothing even close out of a can. I bought it at a local auto paint store. They sold it to me, no issues.
I used a smaller Harbor Freight sprayer.
The paint is 3 parts: paint, reducer and hardener. Wear a respirator, goggles, head scarf and cover all your skin. I wore coveralls and gloves, too. I did it outside on a calm day. I also made a small enclosure to hang everything on while I painted it. Overspray will get everywhere, so stay away fro cars and anything else you don't want sprayed. AMHIK.
Paint has held up just fine for the last year or so. It gets way oil and cutting fluid on it all the time, along with me brushing off swarf. It looks new still.