Re: my polished alloy has a gold metalic look to it
R32 nice, i think there is no way to get the yellow tint off, when i took cast aluminum engine parts to my friends shop to get tig welded he told me that it might not look as good as it could because the cast aluminum absorbs oil and its hard to get out, so i'm thinking that the yellow gold color on your valve cover is just is from oil.
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