Scar-Face was never featured in the cartoon and only years later did he get a figure, but he was pretty instrumental to a lot of the early Marvel Comics G.I.Joe story lines.
The lasting image of Scar-Face for me is him returning to his Coney Island secret hideout, trench coat covering his Cobra uniform and sans helmet.
The Grifter Heroclix was a good choice to convert because all I really needed to modify was the lower part of Grifter's mask thing.
I tried a two tone approach to Scar-Face's trench coat. Not sure how well that worked though...