Spray-on mud and speed cameras?

Hi,

Does anyone use spray-on mud, or know anyone else who does?

I am a journalist researching a story on products like the one at

What are the ways in which it can be used and why? Such products are marketed to 4x4 owners looking to give their vehicle an authentic just-been-up-the-side-of-a-mountain look, but I have read from some people who say they could be used to cover cars' registration plates to avoid detection by speed cameras (something the manufacturer of the above product says it does not condone and an activity it discourages)... Got any stories about either of these uses? Ever used spray-on mud yourself to avoid getting nicked or flashed?

What do you think of spray-on-mud - handy way for busy drivers to get

I'd love to hear from anyone who has used this type of thing or who has any anecdotes.

If you'd rather not be identified, email snipped-for-privacy@gmail.com.

Thanks.