I'm not really one of those optimal tire pressures/ water sprayer guys. I just usually set the pressures around 35-40psi and check them after runs to make sure they're not getting too high - or too low. And that the sidewalls aren't being used. But I usually use tires with very stiff sidewalls, because I like instant response. For my RE070's (two of them are the original equipment tires that came with Donnie Barnes' 04 STi
), I use them at daily driving pressures, which is around 32psi, because the sidewall is so damn stiff.
In the past, I have set the front pressure at 35psi and jacked the rear pressure up really high to see when I would notice a difference. It was around 60psi.
You can also max out your toe-out in the rear, if it's adjustable. That plus really high rear pressure would probably make it rotate pretty well.
As for shoe polish, you don't need it, because the tires have little triangle marks on them that point to the optimum rollover area on the edge of the sidewall. At 35psi, my Dunlops didn't roll over past that point at VIR-N, VIR-F or at the non-pts event at Sanford.
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