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Rust on rear spoiler ???

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Old Oct 30, 2020 | 02:13 PM
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Joe Alonso's Avatar
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Rust on rear spoiler ???
Has anyone experienced rust on their rear spoiler, where the spoiler meets the trunk? I show this on BOTH sides. My W212 is from 2016.
Sorry for the large photos... I just imported them.


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Old Oct 30, 2020 | 02:17 PM
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You sure its rust? I'm thinking more like adhesive from spoiler install...
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Old Oct 30, 2020 | 02:24 PM
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Originally Posted by bmwpowere36m3
You sure its rust? I'm thinking more like adhesive from spoiler install...
Hmm.. interesting... How can I know for sure?
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Old Oct 30, 2020 | 02:55 PM
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There is nothing there to rust. The trunklid is (edit: verified) aluminum, under several coats of paint... but the spoiler is plastic.

Try some water and an old toothbrush...
Last edited by DFWdude; Oct 30, 2020 at 03:57 PM.
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Old Oct 30, 2020 | 02:58 PM
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Dirty adhesive. Someone must have used a caulking compound under the spoiler and it oozed out. The two-sided tape must have failed and that was the backyard mechanic fix.
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Old Oct 30, 2020 | 04:13 PM
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Imma guess it is pollen residue.
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Old Oct 30, 2020 | 04:41 PM
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Originally Posted by KEY08
Dirty adhesive. Someone must have used a caulking compound under the spoiler and it oozed out. The two-sided tape must have failed and that was the backyard mechanic fix.
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Old Oct 30, 2020 | 04:51 PM
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Definitely not rust.

Fairly sure it won't come off with the use of a toothbrush!

Probably need to be cut away ( carefully )!
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Old Oct 30, 2020 | 05:19 PM
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Good old fashion elbow force and it's gone... LOL.. I guess it was really stuck on dirt/crud that never got washed out. Thanks all!
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Old Oct 30, 2020 | 05:21 PM
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Originally Posted by DFWdude
There is nothing there to rust. The trunklid is (edit: verified) aluminum, under several coats of paint... but the spoiler is plastic.

Try some water and an old toothbrush...
You called it! It's off now. Thank you!
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