Re: air compressor question
An oil separator is also a good option to have for painting. Most compressors will pass a little oil into the reciever (tank) and you don't want oil mixed with paint. They have oil/moisture filters that will go in the main air supply line between the tank and the hose.
Follow the spray gun manufacturer's recommendations for inlet pressure. That will require an adjustable regulator, as Maniac57 said.
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