I wish I had a before pic as my calipers were filthy black with brake dust - Spray with Iron-X, wait 3min and rinse with soapy rag and it's brand new looking. I love that stuff.
BTW, very happy with this paint on the caliper - 3 Coats Duplicolor Ceramic...then Opti Coat.
IronX is some great stuff! I personally find more use with TRIX, as its the same thing, but removes tar as well (also gives a green hue when it reacts with tar). I haven't found a Carpro product I didn't like!