I use the AO Safety Quicklatch Pro respirator (#95090, about $30). I originally got it for dealing with a mold problem, and I've used it in the shop ever since. It adjusts to fit my head and face, which is a blessing because I'm a tiny woman, and most of this stuff seems to be made for big men. The Quicklatch part means it really is fast to get on and off, and you don't have to fool around with the straps every time. I also wear glasses, and having a way for the exhaled air to get out means it doesn't fog them up! Not only does it keep the particles and dust out, it also helps with vapors from glue and finishes. I like it waaaay, waaay better than any nuisance mask!
From the manufacturer, via Amazon.com: "AO Safety model 95090 Quicklatch PRO Respirator for continued lung protection from paints, pesticides, organic sprays and vapors, mold, chlorine, muriatic acid, lead dust, asbestos, and more! This high efficiency particulate Hepa filter removes 99.97 percent of .3-micron matter for safer breathing and healthier lungs. Niosh Approved"
And: "These cartridges are recommended for paint/pesticide, sprays/vapors mold abatement,chlorine/muriatic acid, lead/asbestos, dusts/fumes, fiberglass,solvents, glues, thinners, lacquers/enamels, sanding, dust/particles."
Hope this helps!