I usually wait to make a mess until the last wearing day of the kilt. But duffus here put this clean one on, tossed the dirty one in the wash and then decided to chase the leaves. Black really makes dust stand out - did really show the difference in effectiveness of the methods.

The worn Shopvac brush I use most is a boar hair. The bristles are over and inch long and extend past the "sucky hole" about 1/2 inch. I never have to "scrub". The suction holds the fabric in contact with the brush and off of my thigh so air can flow thru from the back side.

I have an air compressor, and have taken a crack at blowing the lions share off. It works pretty good if you blow along the fabric, not towards the fabric. The first creates a suction pulling air thru the fabric from the backside. Blowing towards the fabric just embeds a lot of the dust.