Aluminum molding with lip may be difficult to bend depending on the radius of the profile. Here is a quick tip to bend aluminum molding without kinking the lip.

First if to make a jig of the profile trying to bend to. Key is to make jig's radius slightly tighter since there will be some bounce back after aluminum is release from the jig. Also, jig should be at least same thickness as molding's width. It should probably be slightly thicker. Make sure many holes are drilled for the clamps.

Once you located the area of molding you want to bend, cover the area with Sharpie marker. All you do after that is to heat the marked area with torch. I'm using MAP/Pro gas, but I think propane torch is fine too. Heat the molding until Sharpie marks are gone. Disappearing of Sharpie marks indicate aluminum reached annealed temperature.

After annealed, place the molding on the jig and clamp it at one end. Start bend it to the jig and hold it with many clamps. Repeat the process to the other end. And you are done.

Advice:
1) Make sure to ware gloves when heating aluminum.
2) When clamping aluminum molding to jig, make sure to remove any plastic or rubber protective piece from the clamp. That could melt.
3) If you are bending Roof Molding, you need to use blockings placed in the groove to not damage when clamping.

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