shysal
Hubby uses Showroom Shine. I bought it a couple of years ago from Ideal World shopping channel and he thinks it's great. Lasts ages and keeps well. I will check the price for it on Amazon when he needs some more.
You are absolutely correct about the use of it, do not use on the windscreen. It tells you that when they are demonstrating the product on t.v.
As for the 'pop up' car wash as I like to call them. I have a bit of an issue with them. They take money away from businesses who have to conform to regulations, I believe there is an issue re water drainage and chemicals? Do they pay tax on earnings, can be quite a bit of money changed hands. Are they legal immigrants or are they poor devils working for nowt and kept in squalid living conditions, being used by a gang master??? It happens.
I guess the supermarket car park one's must be sanctioned and above board but I still have my doubts as to the background of it all. I am definitely not implying they are not trustworthy, nor do a good job. I just think sometimes however small an issue there can be consequences we don't think of.