Nut & Bolt dilemma???????

I have spent the last 5 days bead blasting all the parts from my car that will fit into our large cabinet including the nuts & bolts. Can anyone suggest a way to finish them to a satin black that won't chip away the first time I put a wrench on them. I have to do something but I have had no success with paint. Everything else will be powdercoated. Suggestions are appreciated.
TIA, Rat:profilel:
Author: admin