Anodizing will handle the heat without a problem. As suggested, I'd let the anodized part dry at least a week before subjecting it to the heat. The sealing process does not seal the anodized cell 100%. It takes a little time for the sealing plug to complete its formation. I don't know what would happen if you subject a freshly anodized surface to 350-400F temperature during this period. Perhaps someone will respond that has personal experience, but failing that, waiting a week wouldn't hurt.
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