Well, to her son, first off i would say get him a nice electric razor that has an extention for side burns. I havent used a hand razor for over a year. Although i may not be as bad as her son (and also have more experience and knowledge of how to control my hands) I still avoid those razors because they are (a)unncessary for my teenage caliber facial hair and (b) require a bit of concentration for me.
Probably the second thing that I wanted to tell her is that its gonna be harder for him to write papers (and also do general writing hw) than for other kids.
Although im willing to bet that hes really smart, hes still gonna have problems writing up hw and papers because his handwriting is so bad. This will frustrate both of you. She needs to go buy him a program called dragon speak so he can get his papers written with more ease. Teachers will tell her not to do this, "that he'll never learn if he does it that way DOYYYY" but their mostly wrong. Yeah, he does need to learn to use his hands as best as possible, but this is something that im about to buy and that would help anyone.
Thats the most practical advice i can give. Oh, and in general, dont put him in positions where he gets frustrated at himself for being bad at motor tasks (aka with his hands and athletically in general). Im sorry, but he'll always be not as good as every one else at it, lol. Uncordinated is something you learn to live with, not something you can make go away. Tell him to choose hobbies that arent as motor focused.
OKay, ill shut up now.