Ye Olde Inn

Hi!

Though I did quite some metal casting in my time, I never tried resin.
Now I'm looking for a source for purchasing resin, but I'm somewhat confused...
There seem to be many different kinds - Polyutheran, xor crystal, Acrylic were some that I found, but surely there's more. So what kinds of resin are out there, and what are their advantages and disadvantages (regarding to hardnes/durability and flexibility of the hardened material and also of the ability to cast details)?

Some experts out there?

Not sure if this will prove helpful, but here's a link to a molding thread:
http://www.boardgamegeek.com/thread/498 ... tic-pieces

Thanks a lot!
This site don't actually answer my question, but it still has much useful information.