Wheel Well Mouldings?

You can bend wheel well trims from almost any kind of available aluminum. "J" or Rain rail works fine. I often make them from 3/4" aluminum angle with a metal stretcher, but it depends on your metal working skills and available tools.

In general, aluminum "likes to stretch", it "Does Not like to compress". It will kink if you try to compress it in a bend. Keeping this basic principle in mind, it helps to orientate the material your bending so the thicker side is on the inside of the bend. I also cut out a 3/4" thick template of the exact wheel well shape. Screw it to your work table, secure the trim with a block of wood screwed to the table and bend away.

Aluminum "work hardens" as it's bent and shaped. You need to return it to it's soft hardness for bending, and sometimes more than once, if you working with tight radius bends. You need an oxygen acetylene torch in order to anneal the aluminum metal. Coat the area to be annealed with black carbon soot from a yellow "acetylene rich" colored flame, increase the oxygen level to get a "hotter" Blue Flame. Move the blue flame over the sooted area until the soot burns off. Do not stop the torch in one area, keep it moving over the entire area or you will melt the aluminum. The exact temperature you want the metal, is when the soot goes away. The metal will now be soft (like to a 1000 series hardness) and will bend very easy (actually it stretches).

Between annealing the material, and using a bending template you can get pretty creative with your designs. It's easier to "pre-polish" the material before it's shaped, then touch it up after it's in it's final shape.

If it was easy, everyone would do it! LOL