Worked in the acft paint/structures industry for years. Lots of the dusts we were subject to were toxic/carcinogenic ( ie chrome 6, cadmium., etc). A good practice to get into is to vacuum yourself (especially the hands and head/neck area) with the brush attachment of your shop vac before taking off your respirator and eye protection. The reason that I mention eye protection is that the blood vessels in your eye ball, being so close to the surface and your eye is wet, will absorb 10 times the toxins that your skin will, so a respirator alone will not necessarily protect you. Also realize that all that dust in your clothes can present a hazard to your family if you wear them in your house, so you may want to vacuum the rest of you too!!
Just a thought
Practicing at practical wood working