[chevyrestoguy]

You could most of that yourself. One thing to remember is that the aluminum is relatively soft, and is usually stretched wherever it gets dented. Work out the dents slowly and lightly with a nylon hammer if you can. Try to find anything to use as a dolly that replicates the shape you're trying to get it back into. Use a wood block instead of a steel body dolly. You want to try to eliminate "donkey tracks" that occur when you smack the part with the edge of the hammer/dolly.

Those grills were clear anodized (or a process called Brite Dip) from the factory. That coating will get cloudy and pitted over time. You can either find a company that does that process (it's expensive), or if you like it shiny, have a polish shop strip the part and then buff it out. Another process I have considered is having it Jet-Hot coated, wet-sanded with 2000, then cleared. I personally like the factory anodized look over the chrome grills that you see occasionally.

For $20, you did good. I've seen junky aluminum grilles out here starting at $45.