This is turning out nicely (thanks to Mark Schneider's ref pic), but there's a problem, in that despite all the cleanup, small amounts of detail are missing here and there due to the original photo quality. This can easily be seen when comparing against Wildman's version (look at the torso).
So-- probably best just to leave this one as is, as a color / lighting reference. Note that the flyer back (see IPDB listing) has a nice version of the backglass, possibly worth converting.