Hi Guys, I have a wiper blade score on the back screen and was told to get some jewellers rouge. Not being that flush, I don't have any friends who are jewellers so went into Poundland and bought a tube of scratchaway. Its just a light rubbing compound and with a bit of water it worked. Brilliant.

I found this on the web and its for filling cacks on the screen.
Don't know if it works but worth a watch. May help someone.

Amazed me.