Duracoat (Durabake in parkerize finish)
And here is one more interesting post from J.R.:
I added a few new parts and upgrades and Duracoated my 870. The Duracoat product is affordable and easy to use. I chose to use the Durabake in parkerize finish. I spent about an hour prepping and spraying then baked for 3 hours at 180 degrees fahrenheit. The finished product looks great, I will send an update after my 870 is back in one piece.
I can’t stop saying thanks to you, J.R.!