Yeppers...I read the same thing, inacurate good idea, poor execution.
I was thinking about trying to find a tire pressure system like that in the Vette, little sensors mounted inside the rim transmit tire pressure readings to a reciever like 5 times a second or something like that and are supposed to be accurate within just half a pound or so, you can even set it to alert you if they drop below a preset limit...you get a flashy light... shouldn't be to hard to do. Would be damn handy.
As for scrubbing of the release compound, I found, and I know it sounds loopy but driving a few minutes on a dirt road, rubbing a little dirt around the egdes at a stop...or scrubbing them things with a pan and handfulls a kitty liter do a pretty fair job. Rub the liter thoroughly across the tire, from the bottom works best, I don't recommend spooning handfulls of kitty litter across the tops of your nice clean bike.
Scotch Brite pad and water sounds good as well and maybe easier to deal with.