Aluminum roof problems

[James]

I need some advice here.  I have a 91 coleman roanoke royale with a small roof problem. The aluminum on the curved corner has gotten thin in some areas and is cracking.  I removed some of the problem aluminum with a razor blade and need something to fill in the area.   I bought some eterna bond which looks like it will work but I'm not happy with the way it will look.  Has anyone had this problem?  Will Body putty work?  Any suggestions would be appreciated.

Thanks