I'm sorry Jim.....you screwed up.....this IS a brilliant idea. I just bought one. Please vote correctly next time.
Steve

"
I was a judge at this years "National Hardware Show" in Las Vegas and
judged this tool. None of the judges, including me, thought much of
it. By the time you get the thing out and attach it to your recip
saw, unless you have one to dedicate to this job, then attach the can
to the tool, you could have just shaken the thing up yourself. The
only way I could see this thing being practical would be if you had a
LOT of spray cans to shake up. Then it might pay for itself.

Jim