Stubborn brake dust, grease, and road film don't come off with a standard wash. This kit was built specifically for that. Heavy Duty is a super-concentrated foaming wheel cleaner and degreaser formulated to annihilate grease, grime, and brake dust through any applicator in your arsenal. Witch's Brew is a professional-strength, 4x-concentrated iron and rust remover that clings to surfaces, bleeds vibrant purple as it works, and rinses away every trace of contamination. Paired together, these two formulas cover every layer of contamination your wheels collect, giving you an all-in-one decon kit that leaves nothing behind.