I don't have any wave 1 shots, but maybe it was the proto that really was clean... and then HT "dirtied" it up a bit before prod went out.
If you have a pic of a 'clean' one, can you post for comparison?
This is an old shot of edwint's that pjam linked in the Terminator thread, looking at the pics again, looks like how new it looks varies with light, I'll have to experiment with my own, even if there is no paint variation, at the bottom line, the one I own has the right look for me and that's what counts most, just certainly surprised me to not get something all nice and polished like some images led me to believe in way back.