I don't think the model matters but I have a 2 canister half face with P100 filters that I got from McMaster Carr. You want filters that are rated for organic vapors especially if you work with Micarta (mmmm formaldehyde)
Wasn't sure of the title but I came across this tutorial and it seemed interesting.
Enjoy
http://www.seekyee.com/Bladesmithing/the%20process/tutorials/inlaytutorial1/inlaytutorial.htm