A couple of things regarding that image of the dome.
#1--The white "blobs" I was talking about earlier. It appears as though some of the silver/gray damage lays over the white. This would be a strange trick if the white got spattered on the helmet after its paint work was complete.
#2--As I highlighted in these 2 places, it looks like an odd mix of layered work here. If we consider this as a layered paint job, it seems that a base coat of silver was applied, then misted with some darker tone. After which, some areas were masked and a layer of green applied, allowing the mixed silver/darker gray to show through. Then, in some places, it looks like entirely new silver patches were added topically.