Something you might want to consider-
Ceramic Disc Pads:
One of the characteristics that make ceramic materials attractive is the absence of noticeable dust. All brake pads produce dust as they wear. The ingredients in ceramic compounds produce a light coloured dust that is much less noticeable and less likely to stick to the wheels. Consequently, wheels and tires maintain a cleaner appearance longer. To avoid brake-generated noise and dust brake friction materials have evolved significantly over the years. They’ve gone from asbestos to organic to semi-metallic formulations. Each of these materials has proven to have advantages and disadvantages regarding environmental friendliness, wear, and noise and stopping capability.
Eagle A2Z have recently changed their formulation (as well as the colour / design of the container) it is now much less acidic hence the warning that you should only let it dwell for a very limited time has been removed.
I would agree with the other posts that a polymer sealant would be a better answer.
JonM