Paint Thinner, Engine Cleaner is a good one... remove alot of the road grease... then good old fashioned Alloy Wax
works excellent, but your better off buying it from B&Q at the mo it's about £5.00.
Been told MR Muscle oven cleaner works wonders?
on my car & motorbike i use.. Swarfega Alloy( wheel cleaner) removes the most stuborn shite like..brake dust oil grease ect £6.99 a litre
would a clay bar be any good at removing brake dust?
Wonder Wheels is now in my sin bin. It has knackered all the alloys I've had over my life, darn corrosive stuff that slowly strips the laquer off and eats into any chips or scratches. Will never touch it again.
MukOff do an alloy wheel cleaner which is alkaline and works superbly, spray, leave a few mins, wash off. Job done. Used to be sold for cleaning mountain bikes but was re-packaged for alloy cleaning a few years ago. Highly recommended by me.
I use Meg's Wheel Brightener, £18odd from www.cleanyourcar.co.uk for a gallon, and you dilute it 4:1.
Don't use paint thinner, you'll damage the wheels.
No longer owns an Astra
Bye bye VXR Castle Combe Edition - because it's done more laps of Castle Combe than most Bergs have of the Ring