I know this topic has been covered before so don't flame me. Someone mentioned on a previous post that Halfords do something similar to TCut for glass. They said you can get rid of faint scratches caused by wipers on the glass. I have searched Halfords lunchtime and could not find anything. Does anyone know what it is. I have scratches on my screen due to the previous owner not checking the wiper blades for dirt.
Dont use toothpaste. Its much to abrasive and will cloud the screen with minute scratches. Jewlers rouge is better, its very very very fine abrasive. If the scratches are deep enough tho as mentioned they will stay forever.
You've never used toothpaste to clean glass have you? Ordinary toothpaste is one of the best glass cleaners available, because it is mildly abrasive - use about as much on the screen as you would on your toothbrush with a wet cloth. You will not cloud the screen. I've been using toothpaste regularly since around 1992 when it was first recommended to me by a Chief Engineer from Pilkington Triplex. At the time I was the engineer responsible for side glass design on New Range Rover (and sat directly opposite the engineer for the front and rear screens).
As an aside. It was during this time that I was able to visit both the float glass plant and automotive glass manufacturing facilities in St Helens. If you ever get a chance to see glass being made, do not pass it up - it is fascinating.
Trust me I've used jewlers rouge on many an occasion, and if the scratch is anything other than the lightest (i.e. not worth bothering with)then replace the screen.
All you will have is lots of sweating and lots of waisted time.
You can polish scratches out of glass using the same techniques as your local Astronomy Club uses to polish mirrors i.e. by using, under the right conditions, increasingly finer grades of abrasive powder down to something like jewellers rouge or cerium oxide. But as has been said it can be tedious beyond belief!