If the plastic has been scuffed to the point where the plastic trim is actually damaged, then it will require a repair as it would not be possible to remove the scuffs. It may be worth considering the cost of replacing the affected trim piece with a new or secondhand part, but in terms of a repair, depending on the depth of the scuffs, we would suggest using a plastic aerosol paint matched to the colour of the trim. If the scuffs are particularly deep it would require the use of a plastic filler such as PlasGel, sanding down and then repainting.