Had a trapped stone (presumably) under my windscreen wiper this morning, and it's put a nasty deep (able to run my fingernail in it) scratch in my windscreen
Done a Google search, and plenty of ideas about toothpaste and diamond cutting compound that *might* reduce it, but they're all quite old (early last decade). Any new easy miracle cure available, or is it just a case of waiting for a nice big stone chip ?