Definition of patina
plural patinas \-nəz\ or patinae\-ˌnē, -ˌnī\
1
a : a usually green film formed naturally on copper and bronze by long exposure or artificially (as by acids) and often valued aesthetically for its colorb : a surface appearance of something grown beautiful especially with age or use the beautiful patina of this antique table
https://www.merriam-webster.com/dictionary/patina
patina:
a green or brown film on the surface of bronze or similar metals, produced by oxidation over a long period.
a gloss or sheen on wooden furniture produced by age and polishing.
https://www.google.com/?gws_rd=ssl#safe=off&q=patina+definition&*
I've come to associate patina in regard to German helmets as the areas worn smooth by repeated handling and wear. This could involve helmet rims and crowns that have their paint worn off leaving a smooth, dark rusted surface. This could also apply to helmets with multi layers of paint, whereby a camo might have the crown paint worn down to the factory finish. It could also apply to factory textured paint worn smooth.
The closest areas I would call 'wear patina' on this wire camo might be the rims, but they should be smooth from handling. I see rough pitting on the rim indicative of recent oxidation.
Questionable camos do not usually have much if any true wear patina. I see some paint chipped off of vents and rivets on this example, but not worn off due to use.
Some collectors refer to an 'age patina' and point to the apparent age/oxidation shown in the closeup shots. I think this is where most collectors become misled. They see what appears to be aged paint, but this is something that can now be convincingly manufactured. If this camo had been truly worn in combat, the paint itself would show considerable dings, scratches, rub marks, chips, and wear patina down to factory finish or to smooth, dark metal.
I think the wire on this helmet is beside the point. If the paint is fake, then of course the wire application is fake. I would not spend any time scrutinizing the wire. Scrutinize the paint.