you can run a nail gun off a pancake compressor. You can probably use an air brush off of one too, but from the first post of this thread, serjik911 did not say he was having trouble with a paint gun, had bad finishes, he is clearly painting using his 30 foot 1/4 inch hose and wants to know why he is being told he is wrong.
Well, since we are all assuming, you take that same compressor he is using assuming that its good enough to run like he is, and put a bigger hose on it, with the same CFM, and I guarantee, the pressure is going to drop from 30 when he is spraying.
Maybe he is doing one panel at a time, maybe he is painting pedal cars, maybe doors, assuming again. So if you are in a happy place, maybe he does what is "right" goes to his next paint job, and his pressure goes from 30-20 while spraying and starts spitting paint.
That was the assumation, right? Compressor cant keep up, like opening a ball valve when the trigger is pulled, he will start having problems.
So if he cannot afford to be a "real SPI" painter and might have to buy a real compressor so he can use the "proper equipment", the answer alway goes to, if you dont have the right equipment to do it like we say (ego), you should not be doing it.
Us little guys have to stick together. Ego's, LOL, yeah, there are those here.
Dont worry, dont have to reprimand me anymore, or show you are smarter than an idiot, its time to go again, too many ego's here. I will try to stay away this time.