I would say your 60 gal compressor is more than adequate to run a spray gun!
I bought an eastwood mig welder about 2 years ago and LOVE it! Works great. And priced Great. When they first came out i read a lot of reviews on them conplaining about quality control issue, missing parts, screws not tight, stuff like that. But i think they have gotten all those issues sorted out and put out a great reasonably priced welder. I weld a lot more than the average Joe, i think. And I weld everthing from sheetmetal panels to 1/4" angle on trailers. i built my last trailer for my quads and it turned out great. If you buy the 220volt version it also comes with an aluminum spool gun. I just recently got to use mine for the first time and it took some getting used to but ended up laying down some nice welds on an aluminum utility bed on my buddies truck. for aluminum it has to be VERY clean!!
Another thing i like about the eastwood welder is that it is infinitely adjustable. The control knobs dont have clicks. You can set the knob half or quarter of the way between and heat setting or speed setting. My brothers 180 Lincoln 220volt welder is not that adjustable. He has 10 heat settings and 10 speed settings, nothing inbetween. Thats a big plus for eastwood. Also the eastwood uses the same consumeables as a lincoln or miller. I believe they are TWECO style. So just about any hardware store or welding shop will have them in stock.
Make sure you get a bottle of 75/25 argon/co2 mix and run solid wire, i wouldnt weld with out it. You can use flux core wire but its messy and doesnt leave nearly as nice of welds. But will work in a pinch if you run out of gas. i keep and spare roll just in case.
They also come with a 3year bumper to bumper warranty. if they cant fix it they will send you a new one. After three years if you decide on a new one they will prorate your old one and knock some off the price of a new one, which is really nice!
Anyhow, i would not be scared at all to purchase another eastwood welder. i was looking at their tig welder/ plasma cutter combo, but a friend of mine gave me a nice Lincoln plasma cutter for nothing.
Cant beat free!!!