I used oil wet blue jean rags for a shield but my plans include using an old shower curtain underneath to stop any grit that might get through the denim. If you wipe the oil from all surfaces before you begin so that any grit won't stick then a shop vac will get nearly all of it.

A big retrieval magnet is a frequently used item in my shop. The first time I used it hanging on paracord to swing over the floor in my gunsmithing area I found enough parts to pay for the magnet.