While not easy, removing the anodized aluminum surround is that super difficult either. It just requires extreme care and patience.
Start by moving the 2 connector pieces to one side or other, turn over and using a small flat blade screwdriver, insert and lift at the various pinched/crimped points. Use utmost care as you don't want to crush or break the plastic grill. After lifting the pinched points a small amount, use a medium flat screwdriver (for extra leverage) and raise the surround a little bit more, don't pry anymore than necessary as this will aid in the re-installation later. At this point, you should be able to separate the frame from the plastic grill. Don't recall if any adhesive was used by the factory, but if there is, it should be just a small amount, and should not present a challenge in breaking the bond between metal and plastic. The aluminum can be easily bent, so take care in working, storing or moving them.
Installing the alloy frame back into the grill will be more challenging. There is not a suitable way to crimp back the frame back into the plastic without running the risk of breaking it. I suggest using small dabs of medium strength epoxy or hot glue throughout the frame and grill. Doing this should hold the various pieces together tightly and resisting separation.
As for the refinishing of the anodized aluminum surrounds, I would suggest having them re-anodized, polished and clear coated or chrome plated by professional metal plating services such as the aforementioned Speedway. While these are small items, it won't be cheap though.
For the DIYers, you will need to remove the anodized coating, not as easy task as it is one of the toughest finishes out there. You can buy one of those Eastwood anodizing removal kits or try the "Easy off" oven cleaner method that have been touted by some. Then you can start the polishing process through whatever means. Bare polished aluminum oxidizes really easily. Either polish the grills fairly regularly or apply some sort of clear finishes for added protection, (although they are not very durable).
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