Can’t tell if its down to the metal, if it wasn’t I wouldn’t be concerned.They will rust eventually if its down to the metal.
I know you are only taking the **** but even if I did need a new panel it wouldn't really be feasible as the chips are on the Tridion safety shell as pictured...Probably need a new panel, I'd advise emailing your local Smart dealer to ask them for a cost and parts availability.
Not dwelling on anything just saying.Either get a touch up pen, or don't, but please move on with your life and not dwell on such insignificant things - it's not healthy