Which Ap did you use? I'm looking at the Meg's one at £18-19ish for 5 litres. How do you apply? through a spray bottle i'm guessing? And you just agitate it with a detailing brush?
You talk about washing the engine bay, was also thinking of doing this, some people say you should never do this with a hose/pw, if i use a hose then what should i cover up if anything?
Thanks.