I have used it many times as a Roof edge on Straight runs on Larger RV's. (lots of RV'ers damage the top corners of there roofs by driving into things....though as I'm told, its never there fault!)
But as others have said, its to thick to bend.
However, if you were to do a squared off build I see no reason why it wouldn't work if notched at the angles and used in conjunction with "Putty Tape".
Such as;
Happy Trails
Len