Welcome to the forum.
I have a proprietary product in a spray can called 'back-to-black', but the classic item is smooth peanut butter, but that is messy enough itself although it does work. An alternative may be to try a glass cleaner than contains IPA (isopropanol alcohol), that seems to dissolve most things, and WD-40 gives a temporary gloss shine to black trim, but not sure if that is available in Bahrain.
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TG