a quote from the site ""The black is totally uniform and the former line between faded and unfaded BHR is essentially undetectable.
It stood up to a great deal of hand-buffing and took a nice shine, and the buffing didn't appear to remove any dye whatever" (.EV))) Good old hand buffing.....
On a serious note,it might be ok for re colouring black grips,but i don't think it would be any good for changing a colour.