Good study. I would have liked to see what the totals were after 7 days of exposure. After all, anything that gets behind the o-rings is going to stay there.
Also a test of simple-green or other similar cleaners would be cool.
Now if I could just my neighbor to stop using it as his only lube on his non-o-ring dirtbike chains. He sprays that chain off, hoses it down with WD-40 and parks it, ready for the next ride. He wonders why he gets only about 5 months out of a rear sprocket...