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super_dave0069's Avatar
 
Join Date: Mar 2008
Location: Tampa
Posts: 58
Garage
Tarnish removal for engine detail

I've searched the posts and have not seen where anyone mentions what they use to remove tarnish from the fan and shroud. Will something like tarnex work?

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85 RoW 911 cab w/ tail
Old 08-12-2008, 06:58 AM
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19 years and 17k posts...
 
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Location: Dearborn, MI (Southeast Michigan)
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I use Mother's Mag Polish or Nevr-Dull polishing cloths to keep it nice and shiny...
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Art Zasadny
1974 Porsche 911 Targa "Helga" (Sold, back home in Germany)
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Old 08-12-2008, 07:10 AM
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There is really no way to remove but good hand polishing work. Plenty of options and opinions on how to keep it that way. My opinion is to clean it well (you don't have to polish it like shown) and then let it gradually turn into a matte finish. I won't have the shine, but it will still look better then having all the dirt and engine coatings left on from the factory on it.
Old 08-12-2008, 07:15 AM
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Once you complete a complete polishing of the fan removed from the car you should be able to do some touch up with a rag and Mothers to keep it nice.

One of many polishing threads here:

Joining the polished fan club!
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Mark
1987 911 Coupe
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Old 08-12-2008, 07:43 AM
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Hey,

The fan looks so good when polished but experience has shown many that magnesium does not hold the shine. What about having the magnesium fan and housing nickel plated? It can be done. See this company:

http://www.magplate.com/EN%20Samples.htm

let us know what you think.

Cordially, Greg
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Greg Jetson
1987 Carrera Coupe Venetian Blue
1984 Carrera Targa Slate Blue
1979 911 SC Slate Grey (sold, but it irrevocably launched me down the path)
Old 08-12-2008, 01:43 PM
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If you dont want any fine scratches and are doing delicate metal polish/cleaning,
Try toothpaste and a soft rag, it wont leave fine scratches and smells nice
Old 08-19-2008, 02:28 PM
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Does anyone know how to get that straw-color-green finish on the fan that was once was OEM.... ???
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Wil Ferch
85 Carrera ( gone, but not forgotten )
Old 08-19-2008, 04:04 PM
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Join Date: Dec 2003
Location: Upper Peninsula, Michigan
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Quote:
Originally Posted by Wil Ferch View Post
Does anyone know how to get that straw-color-green finish on the fan that was once was OEM.... ???

Either a Dow 17 or Cr-22 treatment seem to be a viable candidate. Both are an anodizing process for magnesium. "The Dow 17 treatment produces a light-green (or greenish-tan) undercoating, about 0.2 mil thick... This is covered by a much heavier, second-phase coating (about 1.2 mils thick), vitreous and dark-green." The Cr-22 treatment produces "green coatings 0.4 to 1.1 mil thick..." (652-654)

Source
"Cleaning and Finishing of Magnesium Alloys.(1964). Metals Handbook (8th edition, Volume 2) Metals Park, Ohio.

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Daryl G.
1981 911 SC - sold 06/29/12
Old 08-19-2008, 04:38 PM
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