I wouldn't spend too much money on the aerosol cans, as they for some reason lose the ability to spray after a while. I have 2 almost full ones in the shed, you can shake rattle n roll them all you like but nothing comes out.
As for the IR ?? reason I wouldn't know but it sounds a bit over the top, but I suppose you are on the right track, speak to someone further up the food chain than the woman at the retail outlet, cheers Dennis