I fixed a decorative door hanging with crazy glue, and some of the glue stuck to my front door, and now there is a strip of black magnet glued to my white metal door. Does anyone know of something that will remove crazy glue from a metal door, without stripping the paint?

Taken fromHow to Remove Crazy Glue
If you're going to have a tube of Crazy Glue in the house, the smartest thing you can ever do is to buy the solvent at the same time. It's just the nature of Man, that sooner or later someone will have even a small accident that is only a drip or spot, but which could turn into a major problem if they can't get it cleaned up.

If you don't have the solvent, or don't know where to find it, here are a few tips you can try. Many emergency hotlines will recommend using vegetable oil for skin-to-skin bonding of fingers. This has mixed success.

Because the active ingredient in Crazy Glue and other super bonders is cyanoacrylics, what you really need is 100% acetone. While some fingernail polish does contain this, it's not usually in the strength needed to break the bond. However, for something like a spill or drops on a surface like a countertop, if you pour the nail polish on and let it sit for 15-30 minutes, it may do the trick. Otherwise, you should try a hardware store for the acetone.

Some users report successful removal with lighter fluid. Keep in mind though, that anything of a chemical nature can damage the item with the glue on it. Test a hidden or small area of material or surfaces with the glue on it, and wash hands immediately after having it removed from your skin.
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I realize that was referenced to another article, but I just wanted to clear up that I think the author of the article meant "fingernail polish remover." I don't think actual fingernail polish has acetone in it, and it will probably make things worse.

Can you use an exacto blade / knife to get under the seal?