I have a set of lyrics to Skin It Back by little feat signed by everyone except Lowell George.

Lowell George's son lives now in the town I grew up in.  

Question is what would happen if I got Lowell George's son to sign it (not pretending to be his father but just as his son perhaps dating it and making an insiders comment).  Would it enhance the piece or detract or have no effect on its sentimental value?