I just got my Holy Grail in the mail, a G1 Jetfire, and he is in great shape. However there is sticker ware and he is kinda dirty with some yellowing. I ordered new stickers from repro label.com but I want to clean him up first before putting those on so i am requesting some help as to the best methods are to cleaning him without damage the figure and if there is anything I should do to take care of the small part that is yellowing or if I should just leave it alone. Any assistance would be great thanks.
Cleaning = soap + water +rinse I also hear you can do it in the top rack of a dishwasher, but I don't know if you'd risk a nice figure like that to try. You could also use Goo Gone for the residue followed by a rinse Yellowing- you can sand it off or you can ignore it. Once again, I don't know if you'd want to risk such a nice figure to try, but that's the only way to take care of it.
What I did was keep an eye out for a Jetfire junker on eBay that had the parts I needed in a non-yellowed state. When it arrived, I took both to pieces (keeping track of where the screws, springs and such went - he has a LOT of small parts in there) and used lighter fluid to remove any sticker residue. I then cleaned the parts with warm water and (oddly enough) Cilit Bang (Cilit BAM over there). I dried them all off and reassembled him, applying the Reprolabels carefully afterwards. The whole thing took me a day or so. It was a long process, but the result was well worth the effort.
I remember it being said before that gentle emery boards (soft nail files) can help to gently remove yellowing.