swir has been hearing that in my circle of friends, they use scrapings from a knife sharpening block. I don't know what they use it for, I think in my particualr circle, the guys learn how to cook by watching their friends, and don't really know the science behind it. I'm thinking, is the sharpening Block a source for RP? swir has got one sitting here in her kitchen... but don't know what its for. I can't ask around about this in swir's circle, so I come to you.

Secondly, It's fireworks season. Is that another possible source for RP?

Hmmm...I don't know about the knife sharpening stone but, if you'll check out the post called "barking up the wrong tree?"

they talk a little about the fireworks question.