I use a short "whip" hose between the regular air hose and the gun. It has a little ball valve built into it, so I can easily dial up or down the air pressure so it's easier to control depending on what I'm working on.
That does work good, I have a Sharpe spray gun reg w/gauge, coupler on one end plug on the other so I can put it on anything at any time. Only use it when I need to just vibrate something small to get it loose, no need for a torch.
