well i found out how to do this. if any one is interrested
take 1000 grit wet dry sandpaper to the deep scratches first then 2000 grit wet dry next then you will need buffing compound called novus2 or 3 depending on how bad your tank is thank use novus 1 to bring the tank back up to a nice shine. the novus is cheap to the great.
60 ga. SPS tank w/ 2 - 175w 20k halides, korallin 1502 calcium reactor w/ph contorler
24ga. SW nano w/150 HQI
180ga. FW aggresive fish
125ga. FW w/60ga. sump. VERY aggresive fish