I would use it with a stencil to spell out funny phrases on my face
If this Anti-Photography Spray really works, it would be interesting to see how well it is adopted by the usual tabloid fodder celebrities. Why wear a constricting bra or underwear under that dress to cover up? Just spray your private bits with a bit of Blur and you can hang loose free and foil the paparazzi all at the same time.
That’s it! Market it as paparazzi proof un-underwear!