Well, whatever the 'overpaint' is supposed to be, whether 'DAK'/Tropical camo or aged whitewash, I looked carefully at the photo of the rear pin, the area that has a significant portion of the 'camo' intact. Other than the aging 'effect' that it exudes, I see no physical wear whatsoever.
In contrast to known original helmets, many which have physical wear (scratches, dings, rub marks, etc...) over most of their surface, many of these camos I have seen show a good amount of aging effect of the paint, but often there are significant areas that have no physical wear at all - the paint is absolutely pristine in this regard; very un-characteristic of known originals.
I think many collectors of camos are drawn in by the age-effect of the camo paint itself, but they don't stop to consider how significant portions could have escaped heavy combat wear in pristine condition, with not one ding, scrape, chip, etc...
Most camos were front-line helmets that saw some of the fiercest combat and thus some of the heaviest wear on German helmets.
When I see absolutely pristine areas of camo, I see a red flag.