That is a confirmation on the repaint at PDX
. I remember seeing a photo in an aircraft magazine (Airliner World I think) as well as in Australian Aviation under Aircraft movements.
Do not know why as 747's are painted in Sydney as well, maybe to test try it or maybe it was cheaper or the previous job was under warranty.
Qantas in February recently sent one of its A332's back to Tolouse for a repaint as it was still under warranty.