Working on the S1 the other day and noticed the black hoses were a little dull. Had some white spirit in the garage and thought a quick going over would bring them back to life. It did'nt It seemed to make them worse. Then i thought some tyre dressing stuff would do the trick but to no avail again. I'm not a bufty as you can probably tell! What can i use to get them nice and shiny guys? cheeRS in advance