Never had an issue with checks but if you can't get a bad one reconciled with customer you can go to the police for prosecution. We did this many of times at a store I worked at after high school.
I don't use German products and don't think it is appropriate for a contest to be based on country of origin I don't care if they are a German company.
Do you apply using a polishing technique/speed or like you are just putting on a coat of wax. Never used a AIO before other than cleaner waxes. I assume you need to polish to remove the defects you can remove and then haze and wipe or just wipe off?
Read some amazing things. Spray and rinse wheel cleaner. Products that can work in heat and sun. Tell me your honest reviews before I pull the trigger. Even if it is far fetched can I use in the shade and agitate wheels and does it work as well as other products?