I do all my boards in small to ultra small rooms. Nowadays I have a good aiir system + vacuum on real sander but before I do all with no precaution or cleaning with no drama. So clean brush dust on board and lam.
I used to shape and glass in a 10x12' shed in Oceano, Ca. No problem doing both in the same room. Shaped a few, blew everything out the door, swept everything out and started glassing. Never had a problem. Even did gloss. I learned early on to not paint in the same room though. Overspray on a shaped blank is a "no-no". Did my painting outside in the Central Coast sun. Having said that; A decent, low db vacuum like the Fein and a homemade or purchased "Cyclone" is a good investment and the solution to dust. Somebody recently gave me a whole house vacuum. The type that is installed in new homes. When the home was sold a new vacuum system was installed. The old vacuum was left in the garage and the new home owner gave it to me. Took it back to my shop, hooked it up and it worked great. Strong vacuum,low db and has a built in cyclone. SCORE!!
That which can be assorted without evidence was read in an illegal magazine.