I have always had a 500ml in my boot of this. Such under rated product for its various uses. Very good for bird schize when you havent got any hot water to hand. Removes tar but hazes as you try to remove it. You can see protection but doesnt sheet very well and for very long. On the very good side, once protected with this, you can wipe almost anything off the coating. Before my mate got a company car, i done his tailgate and then sprayed white paint on it. This was left for around a week to make it solid as possible. Then misted a little SRS on the panel, left on for 10 seconds and then 1 gentle pass took it off. Good for little tasks but i wouldnt use it as an lsp.
A few other GL products i would definately recomment using are the glass cleaner, fog free cleaner and the washer fluid is very very good stuff and reeks of oranges.