Neither of the two previous posters complained about the dust. Maybe we should face it. If you go to Kamp's you'll get dusty, just as when you go to Haubstadt, you know that Tom will re-work the track. Prepare. Next time I'm getting a red bandanna like Mr. Foyt's and some goggles. I'll be ready then.
All I know is that it was a fiercely contested race with multiple grooves.
My guess is that the dust problem has to do with the type of dirt that makes up the track. It wasn't dry, not at all. After the B Main a track worker was scraping dirt off the wall as they do after hot laps. My own term for it is "loose dirt."