Try it, Ken. I think you're being dogmatic about smooth tires being clean and courser finish tires being dirty on the track.
I've not seen that to be the case, at least with our tire finish.
I plateau finish all of our tires, just like I do an engine cylinder.
Our tires certainly aren't "dirty" while racing, and they're certainly out front.
Where ovaltech1 races, I'd probably skip the plateau process and leave them cut open @ 80g -- have you seen some of his pictures from race day?
I suspect that treads would be faster there!
Holy cow, they must have to drop coins in to make the water truck go.