Pretty simple yet a bit time consuming.
Yesterday I wire wheeled and sanded the driver’s side floor pan making sure to get all of the rust off. Most of it was actually just rust dust from a few problem spots:
Then, using some 16GA plates, I tacked the plates over the rust from the inside:
Next, I will fill in the seams with seam sealant and then paint the floorpan with rust inhibiting paint. This is a lot easier than I thought it was going to be.