TWW

So It mean APC is PH-neutral? And also, sometimes we need deep clean for waterspot, lime, and cement, and we need to remove them in limited time, we can use Acid formula. However, I agree for this video for normal car wash with coated car.

I try to do 3Ph car wash because I heard that is most strong & safe car wash method. 3Ph car wash is 1) Wash the car with high pressure water, and spray alkaline chemical for pre-wash. 2) After wait for minutes, rinse the chemical and cover the car with acid foam. 3) After wait for minutes, rinse the foam and wash with Ph-neutral shampoo. I already has car shampoo and acid foam, but I can't find alkaline pre-wash chemical. I has Adam's APC, but I don't have Ph level tester so I don't know it's Ph level. Is Adam's APC is Alkaline? Or you know any alkaline pre-wash chemical?

I want to remove colored spot(from leaflet) on leather armrest but I can't remove it with total interior cleaner. Therefore, I want to buy the strongest interior cleaner. Which one is the easier product to remove colored spot?