Is there any way to de-color meerschaum? I read a forum post (can't remember if it was here or not) where the poster was discussing the removal of some really stubborn grime in an estate meer. After a titanic struggle he ends up soaking it in olive oil on an offhand suggestion from his wife. According to him it worked shockingly well and it comes to mind whenever I look at ebay estates. He doesn't mention any color change but it got a couple cogs clanking over. Everyone talks about coloring meers, but is there anything like a reverse process? I suspect I'll have to get by on "no.", but I am curious about what people consider "done" when cleaning up meerschaums in general. Do you just give it a once-over with your hanky or drill down to the bedrock?