Thanks for the feedback so far. At this point it looks like I have a couple options. Either way I'm going to have to clean the parts if I want to reuse them. So, I'll decide what makes the most sense for costs/time. The tumbler may be an option as a way to start a "batch" and go work on something else. I just can't see blasting nuts and bolts. Too time consuming. I'm going to try and get caught up on some powder coating while I bag the nuts/bolts until later.