So i have a 2009 edge limited and i want to clean the exhaust pipes, only thing though is that the climate i live in can be harsh at times and there seems to be a rough build up of something formed over the exhaust pipes to the point where you cant even see the steel anymore. I'm not really sure exactly how i can get rid of this. its like a rust build up or something has formed over them. what would be the best way to clean the exhaust pipes?
thanks