If you don't want to spring for the supplied air type, above, any canister type half mask will work. Just get the organic vapor/formaldehyde cartridges for it, also get the adapter and cotton dust prefilters. Those will add to the life of your cartridges.
I use a 3M, an Aearo, a Wilson. They are all good respirators. The 3M that I am using now, is a 6000 series half mask, the cartridges are #6005, OV/formaldehyde. I like this one as the cartridges are trapezoidal, and are out of the way. I also use the cotton prefilters.
When not using the respirator, if you keep it in a ziploc bag, the cartridges will last a lot longer.
The reason for the organic vapor, AND formaldehyde cartridges is, micarta, pakkawood, and a lot of other materials , including some grinding belts, give off Phenol, AND formaldehyde gas when worked.
The organic vapor cartridge will handle the phenol, but not the other.
