Cleaning downpipes

Any hot tips/special gunge you guys know of to get your downpipes shiny sparkly? Mine are starting to look a bit grim…

autosol metal polish + wd40 + fine wirewool if pipes are rusty.

yup autosol is awsome. I give em a quick shine every weekend! then every couple of months (this is excesive, but who cares it looks awsome) i take off the whole system and give it a blast with the dremmel and a polishing wheel. :smiley:

harpic limescale remover and a paint brush. make sure you are in the open air tho!