You can buy a durabake moly from lauer weaponry.
I had a gun finished in that (that is what DSA arms uses on there many colored camo and black fals. )
I bought the 1000degree version though and it was a little britle and would scratch if I scraped it on something. I reccomend trying the normal finish first.
If I scraped it on something like a workbench, whatever, it was an easy 20minute job to get it looking brand new again.