I had the similar problem with a Sunfire statue, it was advertised as
inspected and in perfect condition. It came with gold paint on its left fist:
I think the issue lies with sellers gambling that some buyers will settle with the " 'fact' all hand painted pieces will have flaws" and be less than perfect. In my case it seems like deceptive advertisement and the seller tried to pull the "oh I must have missed it" and "it's so minor" excuse.
If I was seller in this case, I would have definitely noted the gold.