I ain't happy. Nope. Not one bit. I tried to do some chipping and weathering by painting Charadon Granite on the metal parts and it turned out awful. I have since painted over the CG parts with Chainmail. I've decided that a very light drybrush of Mithril Silver over the whole model and MS strategically painted in places. I have to make sure to not do all the hard edges because that will make it look shiny and not chipped.
The key to making hard edge highlighting look like weathering is to make it random. I am ok at this but I still tend to do it in a broken but predictable pattern. This is very obvious on my scratch titan. You'll see when/if I post pictures of it.