Owning a Cabriolet, I also recommend the cleaner before the polishing.

3M also makes excellent products for these purposes.

Be careful not to get either products on the Fabric itself. They stain somewhat.

Don't think I would put any tint on the plastic though.

Good Luck

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Mike Mullins
71 250 Coupe
92 400E Sedan
90 944/S2 Cabriolet