Aluminium bumpers

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Hello to all GL fans
I'm very happy today because I'm almost finished with my all aluminium bumper production. They're euro style (till -67) blades only (Guards to fallow soon). They're 2 mm thick and only weigh a little over 1 kg per bumper. I'll have them anodized to make them look like they're chrome plated. What do you think of the aluminium bumper idea? Would it be ok. for the german look theme? How protective are Karbon Bumpers in the case of impact (Just curios)? Any comments suggestions on the aluminium bumper option?
Thanks.