dont do it mate, just get a c/f bonnet or a fibreglass and paint it black.
the mate i mentioned earlier, is selling his car, he has a black f/g bonnet, his stock bonnet is also black, as i mentioned. he had someone really interested in it but didnt want the bonnet and wanted the standard bonnet, then he told him the standard bonnet was black.
not sure if the dude is gonna buy it or not, but he seems to have taken a step back.
just some food for thought.