Need tips on how to repair fiberglass bumper corner

[Colorado S14]

I am looking for tips on technique and materials for repairing the corner of a fiberglass bumper. I have a Version Select bumper that I am in the process of fitting and this is my first foray into fiberglass. I have made repairs on bigger surfaces but not on sharper corners like this. Any tips on how to go about this?

http://img.photobucket.com/albums/v98/ColoradoS14/240SX%20Aero%20Parts/BumperCorner.jpg

[Mirage]

When I picked up a used nismo bumper it was damaged in the same area. I used some chopped strand mat (fiberglass) on the backside first, and then a larger section of woven mat (fiberglass), enough to cover up all the csm. On the outside I used a Evercoat fiberglass filler, but I can't remember which one off the top of my head, it was either everglass, kitty hair or tiger hair. I also reinforced some sections on the backside that I thought might be weak corners. Might have been overkill but figured why not since I was in there.

Seems to be holding up fine, its been on the car over a year now.