I first scored the inside of the bend line half the thickness with a straight edge and my disc grinder. I pulled out a 7 foot long RR rail section, I still have left after the anvil build. I clamped the L section tightly to the rail and using a 5 lb. hammer slowly worked the bend over.
I then removed the clamps and turned the section to straighten the edge on the top rail surface. It doesn't have the sharp bends of a heavy brake but certainly does the job.
So I clamped it to the wheel guards, and joined the three assemblies with a few weld beads.
Here is another view.
Next I completed and welded the drive side door to the wheel guard. I was really scrounging to find a piece large enough for the door. I ended up using the motor compartment access door from the old Delta. Took a little bit of work to adapt it, but it's got a built in plastic handle for opening it. I locked it with a similar knob as the other guard.
So heres a picture of the completed guards.
Not a great picture here, but this is the look from the backside.