Originally Posted by Bart
Seeing stuff like his pics makes me want to pick up a cheap HVLP gun for $25 and give this a go!! I wonder how much the paint is.
Devilbiss GFG gravity gun for finish coats, Devilbiss JGA for primer/ sealer. Those are old school models that have been around forever but they work great. They aren't HVLP (they make HVLP versions) but when I was working in the auto-body field years ago the HVLP guns shot a inferior quality finish and were usually kept around for regulatory purposes or for non mission critical jobs. I think the regulations now are that you aren't allowed to even have the non-HVLP guns in the shop or face a $2500 fine per gun, but that is for pro shops. The EPA isn't going to knock on your door.
Automotive guns and paint are superior to rattle bombs. All you have to do to prep your work area (garage) is line it/ wall it off with plastic sheeting top to bottom like a bubble sort of and have it all duct taped together with a flap to get in and out of. You will be taping/ sealing yourself in during painting so design accordingly. Have a row of those throw away blue filters at one end mounted and sealed in a handmade, cheap 1x3 frame and sealed to the plastic. Then have another filter on the intake side of a strong box fan with the discharge of the fan blowing into the work space (but not directly at the spray work if possible) to create a positive pressure in the plastic bubble. You want to soak all of the surrounding ground areas outside of the work bubble (especially where the air intake is) with a hose to help keep the dust down. It's good to use the high wattage halogen shop lights to light everything up nice but they do create a fire/ explosion hazard if they were to fall over and break during painting so keep them outside of the booth shining through the plastic sheeting. Fluorescent light shows all flaws in paint, even more than the sun so those might be better to use but you still don't want them in the booth. Have nothing in the booth but the air hose, the workpieces and the filled paint gun. If the work area is large enough you can get away with refilling in the booth but I would advise against it in a smaller area so you don't have to worry about spills. Just set up a refill station outside of the booth nearby. Shut the fan down after painting the last coat to help keep dust to a minimum and ignore the work until a few hours later, that way you aren't tempted to disturb it/ knock into it before the paint has set or accidentally bring dust in. I have heard of some guys using those EasyUp tents/ pipe-and-tarp parking shelters as a temporary paint booth with the plastic sheeting and turning out some decent work.