Contact ball polishing

any recommendations for the best way of keeping your acrylic balls in good condition? I've looked around at various methods of looking after them, think a polishing wheel might be the way to go but any links would be useful from the serious contact jugglers among you.
(got a couple of fine scratches/scuffs on a couple of mine, i've done what i can to fix it but advice would be nice:) )

The acrylic’s that I started with have got some real marks on them That simply wont polish out but I still love using them. The only thing I can suggest is getting your hands on a second set that’s the same. Practice with one perform with another.

Sorry… Its what I’ve done.

I know there is such a thing as a polishing wheel(sort of like a special attachment for a drill) which is designed for acrylic polishing, I've heard someone on here before talk about using one, can't find the thread though...