It gives you the ability to layer color, leaving metal uncovered, using fire scale left after high-temp minutes in a kiln. You can sand, scrape, hammer, dent, file, punch, bend and shape...just to name a few techniques.
I created this piece last night. It doesn't totally capture the recently unearthed look, but I think it kind of has that quality. On the other hand, it also looks aquaticish, like some kind of shell that has been attached the bottom of a boat for a year or two.
Whatever, it was fun to work on...