Archived from the Tools In Action forum (Woodworking). This thread is read-only.
I’m learning to use this new gravity fed HVLP paint gun and I’m afraid I didn’t thin my paint down enough for my first test run. You can see the cheapo paint gun I got myself from Amazon in the pic. Don’t worry, the inside is cleaner than the outside. I thinned down some Killz 3 using about 5% water and load it into the cup (still about the same viscosity though), set the regulator to 22 lbs dynamic pressure (the pressure reading when the trigger is open), and start spraying. The trigger rod (as I’ll call it) is dialed all the way back so the trigger goes full open and the fan adjustment knob on the side is about at half. So I go to spray the Killz and this is all I get (pic). I adjusted the fan knob through it’s entire range, all the way small to all the way fanned out, same spitting pattern. Basically I try all adjustments on the gun and can’t get anything other than the same spit pattern. So last thing I try is upping the pressure at the regulator, and still the exact same pattern.
Does this mean my paint is simply too thick and I need to thin it down more?
