I read from [url="http://www.planescape.com/adnd/index.htm"]http://www.planescape.com/adnd/index.htm[/url] rulebook that Dragons can sometimes give their scales to humans and was wondering, if there is a possibility of that happening in BG2.
Disintegrate could make them disappear, the trick with the wand of wonder loses them, if you don't use stone to flesh ability on the dragon and probably a couple of more spells.
I never tried it, but I think killing the silver dragon results in silver dragon blood. Combined with human flesh (Rejiek Hidesman/Bridge District Murders quest) by a certain merchant (nah I'm not giving this one away, complete the above quest fully and you should see it) it creates a powerful armor.
I did, however, never try it (hmm maybe i should get it in just one game to give to a thief w/ use any item ...)