you dont need a big respirator for quick tags, they sell little 2 dollar respirators at wallmart, so you can rock one of those for quick tags, and have your big respirator for pieces, and other stuff when you are goung to be there for a while.
http://www.rosemania.com/images/Respirator.jpg < this is what I mean by big respirator,
http://img.alibaba.com/photo/1133283...H_Approved.jpg < thats what I mean my the little one, so yea you can wear one of those and rock a bandana over top of it or what ever you want to do for quick pieces, it even has the actual respirator pice, the piece that catches the particles. also, these range from as low as $2 up to $10. so yeah, just look out for these for quick bombs and pieces and what not, if you are gonna be there for a while get a big respirator.