just a warning
polishing glass to much or in one spot can give the glass wierd optics [distortion]
Hey
yes that is very true
In all honesty I wouldn't waste the money on a "scratch remover" There are a few companies out there that offer a scratch remover like say Eastwood...save your money.
Sometimes in trying these products...buff/polish the scratches out your finished product is distortion. (is that a word? lol) The compound takes down the glass to get rid of the scratch If anything they are great glass shiners not scratch removers
If it is more than a scuff or something you can feel with your finger nail...buy new glass
And I always check my wipers and window trims for little rocks and stuff...all it takes is one grain of sand to make a scratch and wreck your day