So I use decals on my macbook, and I use one of Pikachu holding the mac apple. I took it off recently and noticed a faint outline of the Pikachu on the mac. It's not really noticable unless you lightly rub a damp cleaning cloth on the mac. But I want to get rid of the resdiue and the faint outline on the mac. Is Goo Gone save? I have the silver aluminum Mac. http://www.ebay.ca/itm/Pikachu-Pokemon-Vinyl-Decal-Sticker-Skin-Apple-MacBook-Pr o-Air-Mac-13-inch-/380762354611?pt=US_Keyboard_Protectors&hash=item58a73473b3&_u hb=1 Would Goo Gone be safe and remove the residue? Cleanling with a damp cloth and water doesn't remove it, so I'm hoping Goo Gone is and safe. I read someone saying it ruined their mac BUT they were using it on a plastic macbook. I'll obviously do a little tiny test and only use a little on a cloth when applying but would it be safe on aluminum?