Please help: VERY stubborn brake dust

[grease]

wheel acid, I know everyone says it damages the wheels but I have never had a problem. Dilute the stuff with water, 70% acid 30% h2o and let sit for about 10 seconds, then brush off with soapy water and a semi-stiff brush. I use this stuff called wheel wonder and it really is a wonder. I am not sure if you ca get it in small quanities, at my shop we get it in 60 gallon drums. I used it on (100% strength) a 10 year old mercedes wheel (painted and clear coated) and literally just blasted it off with a hose. AMAZING, hopefully you find something that helps, if not it's elbow grease.

[shanek]

Wheel acid does work really well but I tried it on mine and it made a mess of the polished lip, it made it very dull. Luckily I only tested it on a small section of 1 rim. We use it at work diluted 5:1 and it is amazing on painted rims as long as you rinse it all off right away but I would never use it on anything with a polished lip.