This page is taken from the series of classes we devoted to electricity in the theater.
Making New Brass Look Old:
fume the brass hardware in a sealed jar containing 26° to 30° ammonium
hydroxide is the tried and true method. It is however hard to get
hazardous material and has become harder to get. It is usually available
at a laboratory and chemical supply company, or commercial printer
suppliers. Use it only in a well ventilated area. Wear eye
protection, rubber gloves and a respirator with cartridges designed
specifically for ammonia fumes.
"If I went with the identical lamp that's in this fixture, are you saying that it would be a more "brown appearing lamp"? You made that reference but am wondering if there is a lamp that is a more white appearing lamp as well. In the application that I will be using these lights, the distance to the stage is approximately 20 feet. I personally think that 575w is a bunch, although I am planning on hooking it up to a 600w per channel dim pack. Is it better to have the wattage there if needed, and just dim it when not? That sounds logical to me" ...