My PCE changed back to at least as yellow as it was before. Considering how much time I spent disassembling all that stuff (PCE, IFU, and CDROM2), making the paste, putting it in the sun every day, under a UV lamp at night, etc there is no way on earth I would waste my time on a process like this again. Next time it's getting painted. No question. Paint stays white more or less forever.