These are the guys who verified the authenticity of tge three camo helmets in my collection.
In talking with them thay said that Disney and Cracker had artist marks that they would leave somewhere on the helmet, like an artist leaves his signature on a painting. However, neither Disney nor Cracker ever said what their marks were, or where they placed them. They pointed out that if people knew what they were, and they coukd be found on a helmet, it would make the helmet vastly more desirable and expensive.
Something else I thought was interesting about the article was the lack of "the rarest" helmet. Disney would wait until a train, containing US troops, was just about to pull out of the station. All of a sudden he would pull out one of "the rarest" helmets (picture in your mind the guy standing in an alley with a trench coat saying "psst, hey buddy") and present it to tge troops on the train. He would claim that this helmet was taken from a dead sniper. The helmet always sold and went for double or triple the normal price.
The article mentioned others who participated in the scam. In one instance one of these other participants had an entire group of little 'ol French ladies painting them for him.