Has anyone used this product "Autosol 2-in-1 Polish and Wax" before? They come as either a paste or liquid. They are not very expensive that's why I am very tempted to buy them. Any feedback regarding its performance? I am quite curious about the product because it is made in Germany and has a "rich heritage" of being used in German cars. I did some initial seach on the web... a lot of reviews were in German which I couldn't read.