Mellow Yellow Wheel Cleaner Concentrate.
Really gets to work on brake dust, yet very kind to wheels because it targets the contamination, not the surface underneath. Unlike the extremely caustic alkali products on the market, created because of scaremongering about acids, this is an acidic treatment with a 'controlled effect' giving the best of both worlds.
This refill version is concentrated and can be diluted 1:1 with water.
1 x 500ml concentrate supplied.