Here are some pics of a recently finished Ork Warboss on bike.   The customer converted it from several ork kits including the black reach warboss.  I used MIG pigments for the rust effect on the metal and the MIG pigment fixer to help keep it on  so it doesn't fall or rub off.  This has been the best solution I have found so far for getting the pigments to stick, didn't wash away any of the pigment and kept it with a flat finish.

Getting real frustrated with my camera setup. It's just a cheap point and click but I may have to invest in a better one if I can't get a decent shot.  I can't get dark backgrounds to focus properly (see Necron pics earlier).