HOW TO REMOVE SCRATCH ON GLASS TANK

[sphelps]

Originally Posted by shrimpchips

No it's not - it's actually much easier than to buff out scratches in glass.

Agreed, very easy indeed and you can even repair scratches on the inside with the tank full. You can buy a kit from J&L, I've used this one before and it works well, you just can't use the final polish on the inside with the tank full but you usually don't need to.
http://www.jlaquatics.com/phpstore/s...uct_ID=cl-asrk

For glass you can get a polishing compound but it will only work on very mild scratches, basically if you can barely see it and you can't feel it with your fingernail you might be able to buff it out but the compounds will likely not be safe to use on the inside of a full tank. If you can feel the scratch there's not much you can do.