Yep, it's mild phosp. acid for cleaning ally wheels and gets the exhaust back to shiny metal. I got this tip from someone else on here (maybe Dutchman, but I could be wrong). Others have recommended shiny sinksALEXG said:Wonder Wheels
The headers still need a bit of metal polish to get back to as new but it saves a lot of hard work and seem to have no ill effects. the Aotosol seems to make them go a nice golden colour very quickly but they stay like that for ages (I last cleaned mine at the beginning of the year and they still look reasonable).

