Engraver,
I think you might have a couple of problems, contributing to the problem. If you are following Don's lessons you may have forgotten one of his very first suggestions, buy a airbrush ready paint, it will help you not having to worry about mixing and thinning. I purchased a pint (16 oz.) of Golden black for practice. I got it, from Dick Blick's, at the same time I bought a pad of the newsprint for practice. Never had a problem with the paint. I still use it for practice. It's not made for T-Shirts, so that Createx will be needed for things like that. Take his advice, buy one of the paints he suggests, it will relieve you of that mixing problem. Worry about that later.
http://www.howtoairbrush.com/content...esson-one-173/
If you are painting on NEWSPRINT it can absorb the paint weird, especially if too thin. But it's okay to practice on. With Golden, I can use as low as 15-20 psi. with my gravity feed and 20-22 psi. with my bottom feed. When you're starting out it is frustrating.
The other problem might be the tank less compressor. Also, you need a water trap/regulator, just to be sure the air is dry and for sure what pressure you are spraying. The 40 psi. is very high for thin paint. That's probably one of the worst problems, along with that pulsing air. I think once you set up that compressor you have for engraving, plus the suggested paint, those things will cure most of your problems. You're just starting out and will pick up on how to do things quickly.
Jan




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