How to use. Spray on Britemax Iron Max and allow it to dwell, watch it turn red/purple as the fast acting formula gets to work removing iron particles and grime. On wheels use a soft-bristled detail brush to agitate and gentle clean between the spokes. Not to be used on hot surfaces, allow to cool before use. On bodywork gently rub in with a damp sponge. For best result apply neat. Rinse well and dry.