Peter: Possibly a question for Coolskin, but any answers welcome.
On the new shaver products we use on some outer plastic parts chrome plating which are brushed after the plating proces.
So the look is similar to steel.
Another possibility is spray painting with 2k system (paint, hardener, solvent)
http://www.shavers.co.uk/shopping.php?product_id=650
The limited edition has a spray paint metal finish