Yes, I have run most of my nuts and bolts through the tumbler. It's a 2 step process - 1st is the green plastic triangles and then walnut shells. I just run it for a long time. Probably 48 - 72 hours for the plastic media and 24 for the walnut shells. I'm pretty happy with the results. The benefits are that you can do stuff in batches; it does the work for you, and it really cuts down on the chances of losing parts. MUCH better than my previous method of the wire wheel on the bench grinder (watch the parts FLY across the room) and the parts are cleaner afterwards.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI