Something to consider, I took a small hobby type oil-less air compressor, rigged it up with a small hose then plumbed it into a 3M disposable dust mask, placed the compressor outside the work area, it creates a positive air supply, it also keeps yer glasses from fogging up and keeps your lungs happy. I had to do something, my wife Audra, apprenticed in Ed Fowlers shop and inhaled way too much sheep horn dust(real nasty stuff!)her lungs were getting in pretty bad shape. This contraption keeps her working without too many problems, she's now taking Claritin and Singulair and packs an inhaler with her... take care of your lungs...We have installed a dust collector, and an air filter system, combined with this positive air supply and have made the work place a lot safer. On a side note, if you forge, invest in a carbon monoxide detector, the ones with a read out that up-dates every couple of minutes, this stuff sneaks up on you, and can kill!! almost found that out the hard way, but thats another story, take care..