Bootleg C-3PO: with...orange paint?

The Polish C-3PO bootlegs of the Comics Spain sculpt arent seen too frequently at auction, but a sample came to market, and this version has what appears to be orange paint on the torso. This bootleg has never been known to have a painted torso - orange or otherwise, so I thought I'd post it to see if anyone else has run into something similar. It appears most of the orange has been rubbed off, assuming it existed in a larger quantity to begin with. It's also possible that the orange substance is something else entirely - like mold growing on a dirty figure. It's not uncommon, for something that's been sitting for potentially decades, which might have had grease, or another impurity coating it for years, to be in this condition as well. Posted to archive it's existence at the very least.