As saabman says its corosion of the alloy. Mine were not very nice at all so I took them off the car and performed a highly succesfull re spray job on them.
Once off the car I masked of the whole of the plastic mirro assembly with 2 inch 3m tape. I then took of a rubber seal and sanded the black frame down using first coarse sand aper then wet and dry to get a smooth base. At least 3 coats of primer then some satin black paint.Again wet and dry between coats.The last coat was a dream and it does look like new.
I cant recall the paint I used at present but the primer and paint was same maker and I think I got it from one of the big chains like focus etc.Not B+Q though.
It really is an easy job and gives much satisfaction.Just mask off well and prepare thoroughly. Also dont rush the paint coats.
Once off the car I masked of the whole of the plastic mirro assembly with 2 inch 3m tape. I then took of a rubber seal and sanded the black frame down using first coarse sand aper then wet and dry to get a smooth base. At least 3 coats of primer then some satin black paint.Again wet and dry between coats.The last coat was a dream and it does look like new.
I cant recall the paint I used at present but the primer and paint was same maker and I think I got it from one of the big chains like focus etc.Not B+Q though.
It really is an easy job and gives much satisfaction.Just mask off well and prepare thoroughly. Also dont rush the paint coats.