I read through most of the posts in your link and did not find anything that I would consider terribly wrong. Anodizing is simply a method of electrochemically increasing the thickness of the natural oxide layer that is present on all aluminum. As someone mentioned in one of the posts the anodizing bath is a sulfuric acid solution and after the anodizing process the surface is porous: I have seen scanning electronmicrographs of the surface of freshly anodized aluminum and it has a hexagonal structure; someone mentioned that the surface 'grows' during the anodizing which is correct, it sort grows to form a honeycomb-like surface (very tiny honeycomb). The dye molecules in the dyeing step simply enter the hexagonal pores by diffusion, then the sealing step locks them in. Actually the sealing simply converts the aluminum oxide to hydrated aluminum oxide; all that happens here is that some water molecules become incorporated into the aluminum oxide structure and this causes a swelling which closes off the top of the pores trapping the dye molecules inside. Another name for aluminum oxide is sapphire and it is clear like glass which is why the dye is visible; 'dirty' sapphire is corundum which is an abrasive. Someone mentioned that aluminum oxide is a ceramic which is kinda right but not completely; aluminum oxide is a metal oxide, ceramics are normally mixtures of metal oxides. This is a bit of a picky point, not worth worrying about; aluminum oxide is hard, very hard, and brittle and doesn't have the same coefficient of expansion as aluminum metal so it is likely that significantly heating anodized aluminum will cause micro-cracking, 'crazing', of the surface which could produce a somewhat irridescent effect. Also the heating could cause changes to the dye molecules, for brightly colored anodized aluminum the dyes are nearly always organic compounds and these can be unstable at moderate to high temperatures; architectural aluminum is often colored with inorganic dyes that are much more stable but are also normally rather drab browns and bronzes. And to finally get to the point; does baking anodized aluminum hurt it? The answer could be maybe; how is that for evading a direct answer. If the part in question is subject to a siginificant cyclic load it may be more susceptible to fatigue failure. Aluminum is a metal that is susceptible to fatigue failure...guaranteed. It does not matter how small the cyclic load is on aluminum it will eventually fail from fatigue. Anodizing aluminum can increase the susceptibility to fatigue failure because the anodized surface is brittle so when the aluminum distorts elastically the anodized surface cracks and the crack grows into the body of the aluminum. Strongly heating anodized aluminum could create many cracks and simply accelerate the onset of fatigue failure.