Simoniz Brake Dust Repellent Alloy Cleaner

Best of the spray-on products. Simoniz claims to be a cleaner first, then it repels brake dust. It undercuts most rivals on price, but you’ll need to use a lot. Still, durability impressed, and although it trailed our top three in the last week of our test, we can live with this as it’s £6 for 500ml. Not a bad choice for cleaning and protecting in one go.

Simoniz  0161 866 4800, www.holtsauto.com