I have used
Silver chrome spray
Silver metal from the can
Bronze special effect spray
Black matt
Several layers of silver spray so that the effect of a heavy metal look
Then spray with a single commission bronze thick brush and spotted a sponge spotted by
Finally, with clear lacquer and sprayed again with chrome silver on the
spotted with fresh paint brush
lacquer and color flow into each other
Crazy, it needs more black to make it look more 'used' maybe? Dib dab with black acrylic and a sponge a bit, or a black spray perhaps? Otherwise it look great. Great job!