Whether to Spray Paint with an Air-Assisted Airless Gun
From contributor J:
Don't do it, unless you have dedicated lines for alkyd/oil house paints. Cleaning the hose lines would need at least two to three gallons of spirits, plus time and effort. If you have a simple Graco or Titan airless sprayer that is the best solution.
From the original questioner:
Now I am confused a bit. We have used oil based through here before but just don't have the right tip I believe. I flushed with regular paint thinner, followed that with lacquer thinner, maybe a quart each time and have sprayed 10-15 gallons of clearcoat since then with no issues.
From Contributor J:
A 10:1 pump should be fine as mentioned. The 12 tip is what you need. I agree when flushed out properly as it appears that you are you should be able to jump from oil to solvent. I like to pull the screen at the gun base also.
From contributor U:
I made the mistake once of spraying oil based poly in my AAA pump. I cleaned with spirits followed by acetone. Thought I was never going to get all of the oil out of the lines no matter how much acetone I ran through it. It fisheyed everything afterwards. I wound up replacing the fluid line and still had a fisheye or two now and then for weeks. If you have a designated pump or cup gun/gravity gun I would recommend going that route.
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