Last year, my medium dollar spray paint gun went on the blink. For some reason, the valve that adjusts air flow for the fan adjustment just quit working; It is hard to paint anything with air flow making a 12" wide fan.
I went with nuclear option and broke out my El Cheapo Harbor Freight gun that I bought for $20.00 several years ago and never used. I should not have fretted about it.
This cheap gun lays down a nice coat of paint. I used it to paint a back box today. I will have no qualms about using it to paint the cab in a few days.
If you need a paint gun and you don't want to spend a fortune, get this one for less than $20.00. You would not want to use it for a custom car paint job or for painting caskets, but for a pin cabinet, go cheap and save your self some money.
https://www.harborfreight.com/20-oz-hvlp-gravity-feed-air-spray-gun-62300.html