Okay, dumb question, but I have one of the PD trade-in 640's on the way and seems most have plenty of wear and blemishes. I have a spray paint air compressor for models. Would it be possible for me to find the right airgun and media and use that?

Try a Paasche air eraser. Worked for me.

Sorry to sound so dumb, but a simple model paint compressor would work? And if so, I just need the media? Is there a special airbrush I would need, or?
Thank you!

What you need is a special airbrush. It's called an air eraser. they make special media for it. Almost any small air compressor will work. Paasche makes a nice one. Look up paasche.com

Thank you, Nesser! I got it now. Is the aluminum oxide okay to use on the stainless or do they sell glass beading media too?

You don't want to use any media that will leave anything on the gun surface. Get some information on what materials will do what finish to the gun.

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H Richard
SWCA1967 SWHF244

if your going to try this you need to get a piece of scrap metal like your working with. They sell about 3 or 4 grits of alum. oxide. You can change the way it looks by raising and lowering the air pressure and moving the eraser Closer and farther away from the work. It will work if you experiment with it. Just take your time.

Gotcha, thanks guys!!