Car washing top tip...

...don't do it on a cold day else you will create a treacherous sheet of ice that is a danger to yourself and to the pavement walking public!

We did melt it eventually with salt but there was a period of time where I had to stand directing people away from the black ice so they didn't go head over heels.  

It's all in aid of Sam's 2018 Peru adventure.  Happily no one got hurt and the client was happy.  Thanks Tony for supporting Sam in his fundraising.