oops... I almost forgot about another process in which this takes place. A molded piece of thermoset plastic is laid in the same type of chamber and a very thin (and I mean extremely) sheet of aluminum is then vacuum formed around the piece to either replicate "chrome" or provide a conductive surface. (this is probably what you were originally looking for answer wise). It's most commonly found on older cars also. The reflective surface of the inside of your headlight (the newer ones where you replace the bulb, not the whole headlight like an older automobile) is a good example. It doesn't hold up to weather all that well. Just look at any old car that's been around and check out the trim or shiny work on the front and you'll notice all the flaking of the material. The ad that sparked your query is more than likely dealing with that. It can be powder coated because :
1) it is now a conductive surface
2) it's a metal overlay on top of a thermoset plastic capable of withstanding heat (it's already cured and therefore will not melt again)
I'd also be willing to take a wild guess that you can anodize,gold plate or do most anything to these vacuum formed metals much like you would any other piece of aluminum making it a popular choice for being a cost effective way to have a "fake chrome" surface. The clear coat is no doubt a protector in this example against the harsh elements making it last longer. Hope that helps..... Russ
|