I posted a longer response to this yesterday, but I don't know what happened to it. I have found several things that will cause a dulled finish. One is a long anodize time. Another is not having absolutly clean parts before the anodizing process.
How are the parts cleaned, anodized and so forth? Is there a layer on the sealed part that can be wiped off, or is the dullness actually the part itself? I believe a bad connection can cause a dull finish too, the part anodizes but not well with a good, and even surface.
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