I don't think this was a combat over paint, baring in mind that scrim nets seem to have been the order of the day whilst in combat.
... Noticing that most photo's taken at Driel show scrim nets in use.
The helmets were one item that in theory had to be returned to stores when the final stand down was done.
If you compare the amount of re-issued "web strap" helmets with wartime dates that you see running through 2, 3, 4 re-issues before finally being written off, ... I believe the same applied to the "Polish" issues.
At the end of use, they went back into "British" stores for re-issue, and the shortest method of "De-Poling" them was to quickly and crudely over paint the eagle (and flashes if present), .. and then on the shelf they would go, .. ready for the next person.