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+--- Thread: Bloody Downpipes. (/showthread.php?tid=81299)
Bloody Downpipes. - Decoke Dave - 01-12-19
Best way to polish the standard downpipes? They are meant to be stainless but that's a joke surely!
Re: Bloody Downpipes. - Dudeofrude - 01-12-19
Have you done the usual Harpic Power treatment? That gets them back to a shiny silver colour. Still have to clean and polish them after but makes a bit difference
Re: Bloody Downpipes. - Decoke Dave - 02-12-19
(01-12-19, 05:04 PM)Dudeofrude link Wrote: Have you done the usual Harpic Power treatment? That gets them back to a shiny silver colour. Still have to clean and polish them after but makes a bit differenceIdeal! Thanks, I have the headers removed, do I simply pour it over the downpipes, leave, then wash it off? Or should I scrub them with a hard brush? Harpic should at least get the shit off! :thumbup
Re: Bloody Downpipes. - bludclot - 02-12-19
If you want them looking perfect then it's a wet'n'dry sand job followed by polishing compounds on wheels. I started with a set along these lines from these guys (that are handily local for me):
https://www.metalpolishingsupplies.co.uk/pro-max-steel-stainless-steel-3-x-1-2-metal-polishing-buffing-kit/
It's not instant results however, time and effort are needed. Once clean it's pretty easy to keep them gleaming, 'little and often' are the bywords.
Re: Bloody Downpipes. - Decoke Dave - 02-12-19
Anyone know the wall thickness of the downpipe tubing? Just passed the flange collar, only a general idea obviously they will vary where they are bent. :thumbup
Re: Bloody Downpipes. - Dudeofrude - 02-12-19
(02-12-19, 12:05 PM)Decoke Dave link Wrote: [quote author=Dudeofrude link=topic=25779.msg305838#msg305838 date=1575216245]Ideal! Thanks, I have the headers removed, do I simply pour it over the downpipes, leave, then wash it off? Or should I scrub them with a hard brush? Harpic should at least get the shit off! :thumbup
Have you done the usual Harpic Power treatment? That gets them back to a shiny silver colour. Still have to clean and polish them after but makes a bit difference
[/quote]
Best method is to pour some harpic in an old cup and then grab a paint brush and just paint it on (paint brush helps get in all the nooks and crannies) leave for 5-10 minutes then just rinse off. You'll see the change instantly.
Has to be Harpic Power though for some reason as normal bleach wont work. That Harpic has some kind of extra corrosive ingredient ?♂️
Re: Bloody Downpipes. - pilninggas - 02-12-19
(02-12-19, 04:15 PM)Dudeofrude link Wrote: [quote author=Decoke Dave link=topic=25779.msg305888#msg305888 date=1575284719]Ideal! Thanks, I have the headers removed, do I simply pour it over the downpipes, leave, then wash it off? Or should I scrub them with a hard brush? Harpic should at least get the shit off! :thumbup
[quote author=Dudeofrude link=topic=25779.msg305838#msg305838 date=1575216245]
Have you done the usual Harpic Power treatment? That gets them back to a shiny silver colour. Still have to clean and polish them after but makes a bit difference
[/quote]
Best method is to pour some harpic in an old cup and then grab a paint brush and just paint it on (paint brush helps get in all the nooks and crannies) leave for 5-10 minutes then just rinse off. You'll see the change instantly.
Has to be Harpic Power though for some reason as normal bleach wont work. That Harpic has some kind of extra corrosive ingredient ?♂️
[/quote]
Harpic Power 10 is Hydrochloric Acid in a gel suspension. Works a treat, but keep if alloy casings. Regular bleach is an alkali and wont react with the corrosion.
Re: Bloody Downpipes. - Decoke Dave - 02-12-19
Seriously many thanks to all! The next job on the list! :thumbup
Re: Bloody Downpipes. - Dudeofrude - 02-12-19
(02-12-19, 09:07 PM)pilninggas link Wrote: [quote author=Dudeofrude link=topic=25779.msg305909#msg305909 date=1575299756]Ideal! Thanks, I have the headers removed, do I simply pour it over the downpipes, leave, then wash it off? Or should I scrub them with a hard brush? Harpic should at least get the shit off! :thumbup
[quote author=Decoke Dave link=topic=25779.msg305888#msg305888 date=1575284719]
[quote author=Dudeofrude link=topic=25779.msg305838#msg305838 date=1575216245]
Have you done the usual Harpic Power treatment? That gets them back to a shiny silver colour. Still have to clean and polish them after but makes a bit difference
[/quote]
Best method is to pour some harpic in an old cup and then grab a paint brush and just paint it on (paint brush helps get in all the nooks and crannies) leave for 5-10 minutes then just rinse off. You'll see the change instantly.
Has to be Harpic Power though for some reason as normal bleach wont work. That Harpic has some kind of extra corrosive ingredient ?♂️
[/quote]
Harpic Power 10 is Hydrochloric Acid in a gel suspension. Works a treat, but keep if alloy casings. Regular bleach is an alkali and wont react with the corrosion.
[/quote]
Ya learn something new every day
Very informative ? Thanks