I have experimented with the Black Chrom on watch case and find it comes out extreamly well and looks good. I mix the black chrome case and copy chrome the watch face and vise versa, very atractive finishes

I recondition old watches and some of the materials used for watch case is base metal and chrome plated. this is a problem when I need to polish out scratches and results in the chrome plate being removed. I found the Copy Chrome plug n plate kit to be an excellent method of rechroming the cases. This has opened up a new option for me now and will try the Black Chrome on some for effect.