I've never tried maintaning inprinted concreat myself but I do notice that not many people bother to look after them.
However after saying that I was speaking to a chap sealing his own and turns out he cleans and seals his inprinted concreat driveway twice a year. I'm betting smartseal sell loads directly to people like that too.
It did make me chuckle that all the smartseal old website packages they sold to cleaners had a direct link to their shop aswell.
Smart cookies or what as jo public could see the vids how to do it themselves and buy direct all from a cleaners website. Doh!