Just wash my car with normal car shampoo, Z6, and put a layer of Z2 on it (previously done Z5 with ZFX x 5 + 1 Z2), buff off with cotton towel. After that decided to put Z6 on it, and I found the Z6 will left a shadow on the surface no matter how hard I wipe it off, once it is dried it left shadow on it (can clearly see it since my car is black). Do you guys have this problem before? I suspect that since I am doing Z2 without ZFX, so that might be the bonding issue here between Z2 and Z6.
What is your opinion?
What is your opinion?