Home Depot granite composite sink - soap scum

Anyone know how to get rid of soap scum from bottom of the Home Depot black granite composite sink? The sales rep at home depot didn't know but did say not to use any abrasive product. She said that Soft Scrub or diamond cleaner might work. Any comments, suggestions or solutions?

 

Frist thing I'd try is a special stone cleaner...may not be necessary, but won't hurt. Stonetec makes some good stuff. You might find it locally or buy it on-line from www.johnbridge.com at their store.

 

A composite sink is not real stone. It is stone dust and resin. Get cleaning instructions from the manufacturer. HD is probably clueless, as usual.

 

I guess you have figured out the problems associated with a black fake granite sink...

 

Found some recommendations on the web

Found this site with what seems like some solutions for the soap scum problem:

http://ths.gardenweb.com/forums/load/cleaning/msg0108240821553.html

I'm going to try the Magic Eraser and Orange Glo solution on my sink.