Hi all,
I found acetone and methanol work a treat! Carbies come up like "new"
Safety warning (or "warring" as was on the side of my chinese grinder box!) Methanol can cause blindness over time. This problem occurs through exposure contact with the skin! Wear gloves and wash off with mild soapy water.
The MSDS's (Material Safety Data Sheet) for any of the chemicals mentioned in this forum makes for scary reading.

Please be careful! I dont know about you guy's but I'd rather save my eye, kidney and liver functions for more enjoyable pastimes!

John