Any experience and advice for cleaning and maintaining older black rubber window and door trim? I'd like to really clean my white 87 wagon's black rubber surround trim. If it gets wiped, rubbed, or swiped - it rubs off a streak of black oxidized smudge that contaminates the cleaning cloth, or the clay, and dulls the paint - making cleaning very difficult. Maguires' forum recommends a Vinyl protectant, but doesn't mention the black streaks I get on my cloth or clay. And it doesn't appear to claim it as a solution to addressing old trim's black smudges. Another source suggested window cleaner (I tried Windex) or vinegar in water, and soap and water. I tried all 3 lot and did reduce the surface smudging, but didn't get anywhere close to zero. I have not tried a tooth brush as it was recommended for cleaning grime and it seemed a bit too abrasive.

I'd like to give the car's factory white paint a good polishing and seal it (every 5 years, whether it needs it or not!). And it hasn't been buffed out in 2 years. The paint's finish looks like it can be buffed out nicely. Is masking the black rubber trim the solution before I wash/clay/polish and seal the paint?

87 300TD 315k