Originally Posted by
ianking
Tardis and Iron cut are 2 different things.
Tardis removes bitumen type spots such as tar. Iron X removes mettalic based spots such as metal filings from railway lines that have landed on the car and metallic rust sposts that have come from brake discs.
I would use tardis for the tar on the car and the tar on the wheels. Its a much cheaper product as well. Im sure I pay about £15 for 5 ltr. You can get some iron cut if you are having difficulty removing the black spots from the wheels. Try tardis in the first instance but if it wont shift it then iron cut should, it is expensive though.