wax or polish

I did my annual double-wax job on my Passat as my first VW show is just days away. First coat was with Zymol, which I've used for years. Second coat was with Mother's. The car is Urban gray, basically a dark silver color, and here's some advice: black wax doesn't hide deep scratches at all, and...

I was looking into getting more of the great Einszett "Glanz Wax" I have been using but when I know they have several types. There is the "Express Polish", the "Metallic Polish" and of course the "Glanz Wax". I'm not very clear about their descriptions so can anyone clarify what each product...