l don't have a metal break so l use a old trick dad and & several grampa's used;
the shop man door. this works on thin gauge metals pretty good, just do a little test squeeze to make sure you don't spring the door.
1. put the piece in-between the back of the door and where it shuts.
2. from the outside. line up the bend with the door jamb.
3.shut the door or make it so it don't move. some experimenting will be required to learn where it will bend with what you are using. aluminum the same gauge bends a little different than sheet metal l noticed.
4. start bending by putting palms, and if needed, a shoulder and push, be careful till the bend is close. go slow and be patient because it's easy to go overboard or crease the metal and ruin it.
just made the bends in a old metal street sign this way for door panels, if l choose to use them, for the the 2 door conversion dodge sedan and it worked great. took a bout a half hour to make two, so the method is a little slow but the results are good.
Later