Oven Cleaner Does Remove Brake Dust
I've tried many products to remove baked-on brake dust from the wheels of my BMWs over the years. I just tried oven cleaner after seeing the recommendation in this forum. It worked very well... better than any other product that I've tried although it still required some scrubbing with a cloth.
I used EasyOff "professional" oven cleaner from Home Depot that does not contain lye (very important), is "non corrosive" and doesn't produce toxic fumes. The package says that it's safe for enameled surfaces, so I assumed it would be relatively safe for coated wheels. I followed up with a double coat of RejeX, which is my favorite synthetic wax.