There really isn't any anodized paint in reality. If someone's advertsing anodized paint, it's a gimick. Anodizing is changing the top layer of metal or an alloy chemically to another color. Plastic can't be anodized.
Grump pointed to the only real way to get plastic to look like chrome, and that's to have someone plate it. Mexichrome paint is junk. It's just silver paint that may have a high content of suspended chrome. It's the same stuff that you paint high temp materials with, like boilers and such. To get it shiney, a layer of special shinely must be applied, and you can't do this at home as far as I know.
Pic 2 and 3 on This Page
shows what kind of finish to expect from a plating service. On the Next Page
, there's a nice note on chroming:
The electroplaters had to strip the black paint off in order to chrome the pump. The steel came up really well and I could have used the cover as a shaving mirror with the finish being so polished and shiny. I think there is a misconception circulating that having something chromed will magically clean up the surface, make it smooth and so on - this is not true. As any electroplater will tell you, when you are dealing with coatings of metal as thin or thinner than paint, surface imperfections are picked up. The moral of the story is, when getting things chromed, make sure the surface beforehand is exactly how you want it to look after it is plated. To use a computer term - Garbage In equals Garbage Out.
I'd look locally by searching through the yellow pages or word of mouth. If you're in a small town or village, then you may need to mail them off because this isn't really a popular thing to do.