Is this natural (silver ) aluminium? and where on the TV? The grilles on the speakers can be replaced, this can be difficult as they slide off, but are a tight fit. Your local Bang dealer can sell you a new one. If its the TV frame and its a natural colour you can try to polish the scratch out. This can be done with a fine metal polish - such as mothers or Autosol. Dont use a crap polish on it. You will then need to use something like IPA to get the oil from the ploish off the aluminium. Do this with care. If the frame is a colour, you will need to replace the frame. Talk to your Bang dealer.
Lastly, did the child escape alive? 