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: d6283 ce977 84b2d
Any ideas on how to fix this - short of replacing the veneer as was recommended to me by the company that made it?

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.