Sheetmetal could be risky to "sandblast" - I don't know which media would be best.
I've been told that it can be painted over, with some scuffing & cleaning, if that would work for you.

I have a set of steel wheels that are rusting through their powdercoat, even though they started as clean and blasted wheels.
I haven't decided on a course of action, but they're not a high priority at the moment.
Nevertheless, I'm curious and that decal remover might be the hot tip.