Scratch removal on bow front tanks glass

[earhtmother]

How hard would it be to remove/reduce the scratches on the feont of this 72g bowfront? Seller had salt & fresh water in & because of scratching is selling for $100 & if removal/reducing is simple/easy/cheap would be willing to bargain for it

 

[Angellove78]

Depends on how bad it is inside or outside. I've used toothpaste on mine on the outside, if you do it a few times it fills it in pretty good for a while. There's steps you gotta do to get it right. Google it in diy glass scratch remover. I don't know if it's safe for the inside though.