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Remove spray-dust and dull patches with Polishing Paste.
Apply Polishing Paste with a soft, lint-free cloth.
After short drying-time polish to high-gloss with cotton wool or with a soft cloth.
Porous material and holes up to 1 cm wide can easily be bridged or repaired in broken plastic using presto extra Fibreglass Filler.
Also suitable...
Aging, weather influences and other conditions can make that the plastic of headlamps by and by will be matt and unclear. Only with a little effort...