clean well, mask the red part, then put on a few coats (or however many you want to get the effect you want...

I personally did it cause i like the whole "Darth Maul" red and black look :naughty:



the tint looks dark or light depending on the lighting conditions... I'll try to find a other pics to show the way it varies...

:edit:
found some, the tint has not changed at all, just the lighting...

older pic...


newer pic...