Cleaning nuts, bolts, and small parts.

And a few more pictures of before and after.

Josh, I like it! Thanks for taking the time to post the pictures. I still use bolts that I cleaned in carb. cleaner years ago. I'm going to try cleaning some your way. I have orchard lug boxes and old cans of good old CAT bolts I and others have saved from the past. Bill

I guess I am surprised that Kerosene cleans that good or it is the hardware rubbing against each other?

Just imagine what it would look like with some polishing media added. Walnut shells, fine grit media, sand... I'd bet you could get those parts completely clean.

I have a tumbler I use for cleaning shell casings ( I reload). I think I will try soaking and washing a bunch of bolts in my solvent tank to get the grease and grime mainly removed, and then dry them out, and toss them in the tumbler with walnut shell media. It will probably turn the shell media black, but I should probably change it anyway, this would be a good last use. We'll see if that takes the rust off!

G

The cleaning action is from the combination of the parts parts bumping around, the grit from the rust, paint, dirt and the kerosene dissolves the grease and keeps it all in solution, you could probably use water and a good dose of laundry detergent and get similar results, kerosene just is easy to rinse off, helps deter rust, and after rinsing with paint thinner or whatever solvent, be ready to primer or paint. Sawdust would probably work even a shovel of dry dirt might do it.
You can also use the tumbler to clean those ever problematic pony gas tanks, add some nuts, strap it in, and turn it on.

There was a discussion on Gas Tanks a year or so ago.
Some guys figure how to strap it to the wheel on a 4-wheeler, a few more said the lawn tractor, some mowed, some just jacked it up in the driveway. Only one guy said strap it in the Cement Mixer and walk away.
Is that you or did you dream it up also?
I like it as I understand the how and why it works now!
👍