I was thinking that too, but not just the grill, the whole car.
I just did this to my RS1 lip, but I'm not putting it back on until spring.

 

looks good. but would be better if it was a lil more neat. like it looks a lil wavy. but for homemade looks really good. a buddy of mines did this with his 240 but he used hurrcane shutter aluminum and came out flawless.

 

I got a chance to get a better shot of the mod. Dont mind the car being a little dirty.