i need to know good way to remove scratches from a 300 gallon, i would like to do just about all of it there is no water in it so i want to get it as best i can now. has anyone used a powersander and the wet dry sandpaper? i got some free samples of scratch removal from tap plastics and they worked great but i just have aa very large area to do and wanted to speed it up. any ideas?? maybe a felt polisher for a orbital waxer that i use on my car??