If your rims and arches are rather dirty and caked in brake dust, spray W6 Iron and General Fallout Remover onto your vehicles wheels and a neat solution of W5 Citrus All Purpose Cleaner into your wheel arches. Leave both the W6 and W5 to dwell for three to five minutes and watch as dirt dissolve into the W6 solution – turning bright purple!  

Hose or jet wash your wheels and arches to remove as much loose dirt as possible and repeat W6 and W5 if necessary, agitate any dirty areas with the appropriate brushes and rinse.