The indigo in my raw denim jeans are turning my Umnumzaan scales a kind of burnished blue. It's actually kind of cool, and I had thought it might happen. So if you want a blasted finish CRK to have a blue-ish tint, indigo dye from raw denim will do it.
I'll try and get a picture or two later when I am out of classes.
I'll try and get a picture or two later when I am out of classes.