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Bubbles in finish1/22
Lately I have been having problems with my clears. I currently use ML Campbell product.
I use a compressor fed airline to a Devilbiss FinishLine FGL4 HVLP gun regulated down to 30psi for most situations.
Only thing that seemed to help so far was thin the heck out of the top coat with Reducer/Retarder and thinner enough to be sprayed at a 15psi pressure at the gun. Taking forever at that pressure.
I have to ask how are you drying? Is there a direct heat source near the work.
Textbook solvent pop.....
So before I got a chance to read your responses, I was in contact with my Campbell rep. He suggested that I lower my pressure down to 15psi. I was spraying at 30psi.
As to the heat source I shut the heat off while spraying to try to prevent too fast of drying or random particulates being thrown around the air while the pieces are drying.
I was using Campbell's Retarder/Reducer. I'm not sure without looking at the can again that it's chemical you suggested.
On a side note, that same rep that was helping me out, brought out a AAA system to demo and we ended up finishing up an entire job with it. Wow. What a system. I have been missing out. I cannot believe the transfer efficiency. Now I just need to be able to afford this system.
I had no bubble issues with using the AAA system either.
Thank you guys for the helpful responses. Much appreciated!
Yes could certainly be solvent pop but if you have ruled that out check to see you don't have water in the line that will do it also.