Got really crusted on black break pad crud on my Sedona alloys. I never tried and of this Auto-Glym type stuff, thought it might be expensive snake-oil.
Tried a bit of white spirit at weekend ( ...ran out of Jack Daniels !! lol ). anyway , no chance of making any headway with that though.
So is the only way to sort this by getting an £8 quid pot of wonder stuff, or is there an every day household substance thats just as effective?