witoutside what ivedone was ake sylicon and put a little bit on the scratch then wipe it down the scratch and it filled up the scratch if not done correctly it will make the tank look silly.
its not what you think,its ceriun oxide ,jewlres use it along with some lambs wool.some water,some ammonia,i will be trying to take some small scratches from my tank tomorrow ill let you know if it worked:idea: