if you don't mind it being shipped off, I would reccomend taking a few hours reading through different folks threads on RODBUILDINGFORUM.COM there is a fellow on there that goes by Whirknot, he is one of the most incredible rod builders I've seen! But I'm sure that would be the proper place to start! If you were looking to do it on your own I would reccomend practicing on a cheap blank before attempting the good rod! I would also get with your brother and ask about what type of epoxy he used and what type of thread he used to wrap it...It could make a load of difference! I know nothing about rod wrapping but I've read enough to know that different epoxy's and different thread will come out different colors once wet or when dry!
Good luck in fixing that rod!