Look at a Harbor Freight Cat. They have several HVLP gravity feed guns in touch up and full size for about $50. I have a touch up gun and it works great for latex, dope and PPG. Loaned it to a freind who was a paint and body man for 30 years and he said it worked as good as any expensive gun. He said if used in a production shop it might wear out but for as much painting as I would do it will probably last forever. Don