I'd love to know of a quick way but i don't think it exists, it was a lot of work, I used wet & dry and wire wool to flatten it, then i buffed it up with polishing soaps & a mop http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=8052552955&ssPageName=MERC_VIC_ReBay_Pr4_PcY_BIN_Stores_ITI was so impressed with the soaps that I ordered some of this stuff to flatten the rest of the bits to be polished, it only turned up yesterday so i haven't tried it yet http://cgi.ebay.co.uk/8-Piece-Abrasive-Pre-Polishing-Kit_W0QQitemZ8053396685QQcategoryZ25644QQtcZphotoQQcmdZViewItem
Probably got lost in the "Great Crash of 08