Sure it can be repaired. You need to remove all delaminated glass. Then grind a taper in the glass and put in place a new layup matching the old as well as possible. Then fill, sand, fill sand, fill, sand, sand, sand, paint, buff. Either you are in for a steep learning curve, get help from someone knowlegdeable, or talk with a professional.
Before I began, I would check the cost of a new blade from John P.
If you want to do it yourself, you choose the right place to ask for support <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />
Here is an A-cat centerboard I fixed. Just to show that it is possible to do repairs on your own..
http://bp0.blogger.com/_Ge8fXRcVp9A/Rni28J3m6uI/AAAAAAAAAFs/plkRreBfgPw/s1600-h/A-cat0.jpghttp://bp1.blogger.com/_Ge8fXRcVp9A/Rni28Z3m6xI/AAAAAAAAAGE/7G6sVhtnUUM/s1600-h/A-cat3.jpghttp://bp0.blogger.com/_Ge8fXRcVp9A/Rni28J3m6vI/AAAAAAAAAF0/YIHQLTDXBIU/s1600-h/A-cat1.jpg
