Get Bar Keepers freinds. You put in a pot, add water and make it into a thinkish paste.
Next, slap it all over the downpipe all the way down. Next, go and chill out, make a coffee, clean other parts of the bike or just stare into the sky.....I left it for about 20 minutes
Next, get a cloth and the BKF will have hardened, wipe it off, its like chalk.....next, grab some coarse wet and dry.......add autosol and sand until the autosol creates a paste and you start to see it going shiny. Wipe off the autosol. If it is still dull and grey / blackish.....keep going. Kept doing this until it was all clear metal. Next I used fine wet and dry....finally......autosol and wire wool to finish.
Once done, just then buff with a cloth.
Thats how we did it anyway. Each bike from start to finish on downpipe only took bout 35 minutes work....but well worth the shiney ness.
