Gunk Driveway Cleaner

Here's a grease-busting name familiar to those who work on engines – but does Gunk offer an equally good solution for clean driveways? Well, sort of. It all but lifted our fresh oil stain, and made a reasonable job on the ingrained mark. Application is rather long winded, though, requiring a 15-minute soak between brushing in and rinsing. Gunk says that a weaker solution is safe to use on tarmac.