External scratch filler/remover

[Piazzon12]

The 120 I bought (used) has a 6 in. external scratch, either from the move or it was always there and I missed it because of how dirty the tank was when I bought it. Anyone know of a filler/remover that works?? It pretty much disappears when wet.
Thanks,
Adam

 

[RyanM]

They make a scratch coat for glassess. Something like that may work. Its worth a try. Do a search for lense scratch removal. Thats what I would use.