so while i had the car up in the air to do the back box thought i would waxoil under the arch's took the wheel off and spent a good 30mins cleaning under the arch with the jetwash, wheel cleaner acid and scrubing brush came up like new then i masked it all up the put black hammerite round all the edges then spray'd the waxoil on. only 3 left lol have a look at the pics