Bob, I've seen the Pecos River Brass Santa Fe HW's and they are dark...almost look black under poor lighting. Maybe ScaleCoat would work. I know Polly Scale is far too light, it's lighter than the solvent-based Floquil, and that looks too light in comparison to the HW's we have at the shop. You might have to "roll-your-own" and add some black to some brand of Pullman Green. I really don't know on this one. ???