Thanks everyone, this takes patience on my part but also on the part of the customer and James knows what this takes. Restoration is a step by step process which can not be rushed and then sometimes you get a curve ball thrown at you like the extra finishing that is now being done along the back of the helmet. I was ready to restitch the rear visor and be done but now I can't until those 2 spots are filled in. This new problem will set me back almost a month.
How are the pieces of old finish glued on to the shell? They are glued on using new finish. The large bare spot was sanded to give a "grip" surface for the new finish. Next a layer of new finish was spread on and the old pieces were set into this. The more old finish that can be "glued" on to fill in, means less time to fill in the bald areas. I would like to remind everyone, that there are 2 sides to the skin of any animal, including us humans. There is the smooth hair side which is exposed to the elements and then there is the rough flesh side which rests against the inner tissues and muscle. All hauben had the finish sprayed on the rough flesh side because it provides more "grip" for the finish to stick to. Every time, you look into one of your helmets, you are looking at the smooth hair side of the cow hide. When you look at an officer sweat band or OR's liner the smooth side goes against your head and the rough side is hidden which makes sense, you want the smooth touching you not the rough.