Bonny there is a method to use for getting that look of Nitre bluing on small parts like screws etc. Though I feel that in your situation it may be just as impossible to obtain as the rest of the chemicals. You need to bring the parts you want to blue to a good polished finish, then dip them in a 50% Nitric Acid and water solution for about sixty seconds then heat slowly in a flame until you obtain that blue colour you want.

The only lessons in my life I truly did learn from where the ones I paid for!