Preservation League of New York State
The Preservation League of New York State is dedicated to the protection of New York's diverse and rich heritage of historic buildings, districts, and landscapes. It actively encourages historic preservation by public and private organizations, agencies, and individuals in local communities throughout New York State and provides the united voice for historic preservation.
So far I really like this, much better than Das clay. It has no unpleasant odor and is very smooth, takes detail well. Has a distinct leather hard phase where you can work that way, really neat. Hasn't been long enough to really test finished strength though as that takes two weeks (it's dry though in a day or two).