I am building my first trailer and it is a squared off version of the TD. I am just about to the point of installing the aluminum skin and trim and am in need of some advise. Since i am building more of a squared off version i have 3 edges that are going to be somewhere around a 135 degree angle. i came up with 3 different approaches and wanted to know what you guys thought about them. if they would work or which one would be the best.
1. take a right angle and heat it up over the edge and then wack it with a rubber mallet until it forms to the edge. Not sure if this idea would even work.
2. take a 1" flat stock and use a rubber mallet to form it over the edge.
3. score the under side of a 1" flat stock with a dremmel and then use a rubber mallet to form it to the edge.
If i am way off on these ideas please dont hesitate to say so.

Any help you pros might be able to give would be great. thx