On a Previous Post I inquired about Re-bluing the parts... A suggestion was offered, Brownells,   
OXPHO_BLUE_reg__CREMEThis very slow and does poorly, I've been using Brownells Creme Forula, DICROPAN, T-4 Touch-Up..... 

This does much better, faster and covers better than OXPHO.......... 

Just a Helpful Hand..