After watching the season 4 episode last night where Data creates Lal and also give her human skin colour I was wondering why Dr Soong couldn't have given Data, and Lore, human skin colour as it it couldn't really be that hard to apply, even with todays materials? Did he only make there skin gold so that they would stand out from everyone else deliberatley so no one would "fear" them any more than they probably already were? If that were the readon then even after that if Data chose to, then he could he easisly apply skin colour himself to properly blend in and bring him closder to actually being more human, which is what his goal is/was.