sanding magnesium wheels??? - BMW Forum - BimmerWerkz.com
3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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#1 (permalink) Old 09-07-2009, 10:46 AM
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sanding magnesium wheels???

any advice? should i do it?

i want to sand 'em down and black 'em out.

it might help to put up pictures of them, they'll be up in a sec...

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#2 (permalink) Old 09-07-2009, 12:38 PM
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here are some pics of the wheels...all in poor condition








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#3 (permalink) Old 09-07-2009, 12:46 PM
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think they would look good black, iknow magnesium is highly flammable but i think u have to actually light it to get a good fire. just to be safe wear a mask for the dust
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#4 (permalink) Old 09-07-2009, 02:42 PM
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Originally Posted by CanadianWraith View Post
think they would look good black, iknow magnesium is highly flammable but i think u have to actually light it to get a good fire. just to be safe wear a mask for the dust
Sand it very slowly with a silica based sand paper. Using a grinder/polisher could cause it to ignite with certain types and high speeds. The autoignition temp is only in the 800 degree range and a spark can set it off.

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#5 (permalink) Old 09-07-2009, 03:01 PM
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holy shit man, that was some good advice.

i would have never-ever thought about that shit...

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#6 (permalink) Old 09-07-2009, 04:33 PM
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Are those ACS Type 2s? I didn't think they were magnesium ... thought they were aluminum. No?

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#7 (permalink) Old 09-07-2009, 05:32 PM
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i don't know, the guy that had the car before me has mag cleaner...

i just figured that if he had mag cleaner he would have mag rims, i mean it made sense to me....

but then again he wasn't a car guy, maybe he just got the first cleaning product with a picture of a car rim on it?

thanks for the heads up, i'll look into it.

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#8 (permalink) Old 09-07-2009, 06:23 PM
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They are prob aluminium man. Should be able to tap on them and tell the diff.

They are aluminium, you can tell by how the wheel weights are supposed to go on! Unless mag weights are the same...


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#9 (permalink) Old 09-07-2009, 07:34 PM
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Magnesium wheels are very light (and very soft). On a street driven car, they'd get bent within the first 10 miles; I think they're aluminum, which means you can sand them however you want.

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#10 (permalink) Old 09-07-2009, 07:57 PM
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sand away brother! take some pics when ur done

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#11 (permalink) Old 09-08-2009, 02:44 AM
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i was wondering if i should just buy some new rims...

i was getting a ton of dirty looks painting my car in the parking lot...

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#12 (permalink) Old 09-08-2009, 03:24 AM
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the AC Schnitzer rims are aluminum, I'm pretty sure about that


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#13 (permalink) Old 09-08-2009, 07:43 AM
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yeah i'm pretty sure they are...

i just don't know if i want to sand them down or not...that's not really something you can come back from.

once you sand up the wheels they are pretty messed up...

i don't know, hopefully i can find some decent rims / tires for pretty cheap.

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#14 (permalink) Old 09-08-2009, 09:19 AM
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yeah i'm pretty sure they are...

i just don't know if i want to sand them down or not...that's not really something you can come back from.

once you sand up the wheels they are pretty messed up...

i don't know, hopefully i can find some decent rims / tires for pretty cheap.
Use fine grit and wetsand, then paint when you're done.

I had silver wheels on my Suby, put the car in some bushes, scratched the crap out of 3 wheels, bent 1 ... bought 1 replacement, sanded them all down and painted them gold. Looked factory.

If you take your time, you can make them look brand new again.

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#15 (permalink) Old 09-08-2009, 03:23 PM
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sweet! that's good to hear.

maybe i'll give it a try....

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