Ok guys lets just drop this topic because A.) It is not productiive and B.) No one has yet to be able to actually prove this point one way or another. So let me just put my thoughts in here on this the way I see it and you guys can take it for what it is worth.
First, all 15x7 inch snowflakes were finished like this rim:
It does not matter if the car is a regular Trans Am, a Y82, a Y84, or a Y88. The cars in 1977 and the non-WS6 cars in 1978 and later came with this snowflake style rim painted and finished like the rim shown above.
As far as the 15x8 snowflake rim that started in 1978, yes ALL GOLD rims that were ordered came finished like this rim:
The argent (grey) rims did have all the machined edges like this rim:
But all the gold rims were painted all in the middle except the outside edge. Does not matter if the car was a Special Edition or not... ALL 15x8 GOLD snowflake rims were like shown above. And like ta78w72 said earlier, when they changed to the machined edge like the argent rims is till left up to debate because there is no solid hard proof one way or another. It may be one of those debates that never gets settled once and for all with solid evidence. So take it for what it is worth and lets not try and beat a dead horse here.