Has anyone else heard of scrubbing rims radially (in the same direction the spokes run, from the hub to the tire) with scotch-brite pads to increase braking power? That or using sugar syrup to make the rims 'tacky' for more advanced grabbing in wet weather? (my 2 cents, don't use the last one in dry weather unless you're *very* careful with it... and I would be hesitant to put it on my front wheel at all. (endo!!!)