Yep those are my brakes 
I used black paint and thinned it out a little. Brushed it into the gaps and let it dry. Polished off the excess with Autosol. Repeated it a second time to get better coverage.
Nice.. Yours look better than the ones in the link I posted - your graphic has a sharper edge..
Defo going to give this a go.
Good suggestion about doing it in a colour to match the bike!!
ta,
Paul