Hey folks, complete Audi noob and never had the joys of owning a cabbie before. Don't know an awful lot about cars my bro looks after the mechanical side of things in the family. Just bought an 07 A4 cabbie last week, its in superb nick just a few marks appearing on the roof. I was given autoglym for the roof from the previous owner but on browsing this forum its just raised a couple of questions if anyone can help please. how many times a year should it be cleaned/treated after its been cleaned/treated I've noticed people mentioning it should be re-sealed...why, and what products best how do you go about cleaning it week to week i.e. Saturday morning car cleaning session in the summer Any do's and don'ts I should be aware of Many thanks in advance for any info received!