Autosmart Smartwheels 5L
This product needs to be watered down to at least 4:1 mix, therefore giving you at least 20 litres of useable product. Spray on, agitate with wheel brush if needed, then just wash off.
We have tried many many alloy wheel cleaner, this is by far the easiest to use, whilst getting the best results.
Made by Autosmart, a world leader in cleaning chemicals.