Stupid
Its true, Carpenters do clean them selfs off with hoovers before they head home.
Dust crawles in anyware, so I have to side with the poor polish bloke. Or do you like sitting in public transport with someone head to heals covered in dust.
As for a security person seeing something like this its would seem odd.
I use to spray paint in a shop.. The spray paint would go in everything after a day spraying. I contantly dug for gold but got paint. Yes Gross, I had to bath for 2 hours a day with a brush daily and it was painfull. Its just one of those trade things.. Next time have a look at builders hands, Its a way of life. Not something office people would ever understand.