Hey again,
It sounds like you need a fume extractor of some sort.
You could go out and spend some big bucks on a portable extractor that filters the smoke, or you could make you own setup for under $100.
All you need is some 4" PVC pipe, a 4" "Y" fitting, some flex duct, rope & pulley, a hole in the wall, and a squirell cage blower.
If you attach the blower to the branch of the "Y" and set it up to blow outside through the pipe, the airflow will cause a venturi type suction through the outlet of the "Y" fitting. If you attach the flex duct to to fitting outlet and hang it from the ceiling where it will drop down over your work, it will suck out the smoke and blow it outdoors. This way you don't send sparks and dust through the blower fan which would mess it up. If the blower is inside the room as well, it's natural suction will also remove senondary smoke that escaped the flex duct suction.
Ceck out this link to give a picture of a similar setup (without the blower)
http://westcoastenvironmental.com/extractor_arms.htm
Just a thought...
Tim