Chimney repair - how to fix?


Blowing leaves out of the gutters, I see that our fake stone veneer chimney has some cracks and starting to deteriorate in areas:
http://www.tiikoni.com/tis/view/?id d6283 http://www.tiikoni.com/tis/view/?id ce977 http://www.tiikoni.com/tis/view/?id 84b2d
Any ideas on how to fix this - short of replacing the veneer as was recommended to me by the company that made it?
Cheers
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