My car has had a Protech-treatment when it was new , and i'm till today veeeeery pleased with the result.
I spray their produvt on my sportdesign rims; high pressure treatment, (never had to use a cloth or spunge to rinse my rims) ready and shining again.
Have to admit the is being washed weekly and has never seen a carwash until now.
The shine of the paint is still very deep and beautiful as the first day!