one of my anthracite geminis have been scuffed. I recon i can dress the diamond cut section enough to be less noticeable. I need to touch up the paint, has anyone found a match for the anthracite?

Feel for you.  I put a teenie tiny scuff in one of mine recently.  I intend to polish it with emery cloth then fine wet and dry then apply a little lacquer for corrosion protection.  Mine is basically just the diamond cut section I think, but if any body knows a colour match for the anthracite it would be handy to know.