Details, details: GoreTex filter in vac is _much_ better (IMHO) at
trapping fines than DC- those sub-micron fines are the stuff that gets
down into your lungs. (USCG has investigated this for years re
shipboard engineering repair safety.)

Crunchy-dust here and there? Scoop it up.

Nasty fines down in your lungs? See what develops.

HTH,
J