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1984 Porsche Carrera
Join Date: Dec 2012
Location: Adelaide, South Australia
Posts: 321
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Porosity in Aluminium Fuchs
Just had my wheels stripped, painted and outer lips polished. The rears came up a treat but the front outer lips seem to have little bits of porosity in them. The company who did my wheels said this is not unusual in alloy wheels that are not forged or pressed and its just the prosity in the manufacturing process. Dont get me wrong its not bad and you can only tell from close up but I thought it was odd as the rears came up without this issue.
Could it be a case the polishing didnt go deep enough and it needs a bit more time on the polishing machine to get out or is this really the case and not unusual. I cant recall if the wheels were like this before cos they were dirty which may have masked them or any issues including oxidization or corrosion of the alloy which it could actually be. They are not very deep at all and look like little specs or blemishes. I was thinking of maybe spending an hour or so with a mothers power ball to see if I can get the specs out? Heres some pics  
Last edited by ozracer; 05-11-2013 at 11:14 PM.. |
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05-11-2013, 10:34 PM
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Registered
Join Date: Oct 2003
Location: London Ont Canada
Posts: 3,120
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Are you certain they are real fuchs? Factory Fuchs ARE forged not cast. Aftermarket copies might be cast. If they are real ones then additional polishing should help.
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1980 911 SC 3.6 coupe sold 1995 993 coupe 1966 Mustang Shelby clone 1964 Corvair Spyder Turbo gone 2012 Boss 302 |
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05-12-2013, 03:51 AM
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a.k.a. G-man
Join Date: Sep 2003
Posts: 13,614
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When I had my wheels (Fuchs) restored, the guy that did the work noticed the same issue.
He said it was not uncommon for older aluminum wheels. It took some more time to get it right but they came out perfect. And yes, real Fuchs are always forged.
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Сидеть, ложь, Переворачиваться |
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05-12-2013, 03:56 AM
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Registered
Join Date: Jul 2006
Location: Honolulu, HI
Posts: 9,843
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I'd leave it as some pits go on and on and on. My 86 turbo had chromed Fuchs and being Hawaii, we're surrounded by salt water/air. Naturally they corroded and I had the chrome stripped and polished the wheels. Some pits kept going.
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The fun - '06 Carrera, '79 930, '06 S4 Avant, '16 i8 The mundane - '24 Tesla Model 3, '22 Tesla Model Y, '19 Tacoma |
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05-12-2013, 04:52 AM
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1984 Porsche Carrera
Join Date: Dec 2012
Location: Adelaide, South Australia
Posts: 321
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Yes they are real fuchs i did not know they were forged ill hit it up myself with some extra polishing i figured that was the problem they needed more work. The pitting may have been corrosion.
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05-12-2013, 04:55 AM
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1984 Porsche Carrera
Join Date: Dec 2012
Location: Adelaide, South Australia
Posts: 321
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Ps he only spent an hour polishing each lip i dont know whats normal timewise to get a real good finish anyone have a better idea on this.
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05-12-2013, 04:58 AM
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This is like true magnesium wheels...they don't hold air either.
With your problem, just like old mags, just paint the inside of the rim with a good paint....we used to use Glyptol (used for painting electric motors)....works like a charm...will hold the air in...and doesn't show on the outside. Bob
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Bob Hutson |
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05-12-2013, 09:46 AM
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Registered
Join Date: Mar 2010
Posts: 799
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I not convinced that what you're seeing is the result of porosity. If the wheels were in bad shape prior to the restoration it's entirely possible that they were badly pitted.
The more in depth restoration shops will turn damaged lips on a lathe prior to polishing and re-anodization. Of the wheels that I've seen go through this process, I haven't seen pores or pits like yours.
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1973 Coupe Projekt X (AKA bunch o' boxes full of parts) |
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05-12-2013, 10:15 AM
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Harley
