We have anodized fully machined parts that are several weeks old (even a few months, actually), and they come out perfect without a seperate de-oxidizing step. So, unless there is something about the buffing process that causes parts to oxidize quicker than normal, I would guess the parts should anodize ok even after a fews weeks time goes by.
On the other hand we have parts that are vibratory tumbled, and they need to be de-oxidized because of that. Even if the parts are freshly machined, de-oxidized in sodium hydroxide, and tumbled for 10 minutes, they still need to go through the de-oxidizing step again before tumbling.
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