The tailpipes on my A4 are black! I tried cleaning them last week with wonder wheels but it really didn't have much of an impact on the black grime stuck to them. I left it on for quite a bit and used a brush. It's also on my rear valance aswell and just looks scruffy tbh.
Can anyone recommend a product that will shift this with relative ease? I was gonna try the old wire wool but i think i need something to dissolve the majority of it first cos it really is pretty thick.