From black anodized metal? Acetone, mineral spirits? Without damaging the black anodizing / parker'izing?
Alcohol will dissolve dried shellac, for certain.I don't think that's correct once it's dried. I don't think you'll damage anodizing with most solvents, it's not exactly a coating, more like aluminum's answer to case hardening. Lacquer thinner would probably do the trick, although you might have to resort to an actual paint remover, if you were closer I'd offer you some of my coffee . Actually, Citri-Strip is a surprisingly effective finish remover, I used it to remove the plastic coating on my old Airstream travel trailer. Good luck.
Yeah, if you've used MEK you're excused if you don't remember. That bubblegum's pretty nasty.I cannot speak for Parkerizing as I have no experience with it but for "anodizing" as the word industrially applies in my mind of using electrically applied dyes or clear on aluminum to apply color , protection or just for surface hardening aluminum, Alcohol will thin and soften Shellac so it may be removed with a rag for sure but I also would try any handy solvent of your choice which may work faster since few if any will harm Anodized things. I've used Alcohol, acetone, lacquer thinner, mineral spirits, paint thinner (and maybe even MEK I don't remember) on anodized things to remove paint,, adhesive gums, and grease, without harm to the anodized object. (some may require secondary cleaning to remove residue) Obviously try a small unobtrusive spot first.