Decal Glue removal? Options

[rave2n]

Hello all, I've googled my brain out to find a way to remove the decal glue, but it seems there is a million ways, but non say are 100% sure of safety to the exsisting paint/coat. I removed the vinyl part via heat gun, some of the decal was so old it just fell off, some peeled.

So I ask you experienced ladies and gentlemen, how in the heck do you remove that damn glue, without hurting the exsisting paint.

I went to a local store and they suggested rubbing compound, which worked wonders on the oxidation, didn't even touch the decal glue, even after 10 mins of rubbing it like crazy, nothing changed. Since everyone here is more then familiar with the paint jobs on our celi's i figured someone might have a good idea. Thank you in advance!


Side Note: Touch-up pens suck. Alot.