Nitre blue the part!! Don't laugh, nitre salts can be used to give any number of different color hues. Remember the original Luger sideplates and triggers in that deep straw color, that's it. They just weren't polished extremely well before nitre finishing and were not quite the look you can get if you take a bit more time. If you buff the piece to a high polish before you nitre finish it, and watch the temperature chart carefully, holding the temperature at the Deep Yellow to Straw level on the chart, the finished product looks great. It's not precisely the color of gold if you hold a piece of gold jewelry next to a finished piece, but it's very, very close, and it holds up very well. Most people think it's gold plating. I use it on my doubles when I have Don Menk re-case color an action for me. There I go giving away secrets again.