I'm not sure if this has been mentioned before or not - I've had some brownish stains on my alloys for ages, and I've tried all sorts of wheel cleaning stuff, scrubbing etc but nothing would shift them.

Well when I was cleaning the car yesterday I tried a bit of T-Cut on them - lifted the marks right off!! It shifts the brake dust pretty well too.

Might give this a try. Never thought about using it to be honest!

yeah it works well, i have been using it on the ocassion for a good while now. top results too

Does it knock off the glaze on the wheels though?

I've had some brownish stains on my alloys for ages

Slow down. The alloys are getting worried !!