I went back to the driver's side handbrake to replace the hardware there too:

Onto the next thing - at some point in the past, the rear mudflap brackets were cut. I originally just made up an extra bracket but it wasn't up to the abuse and the mudflaps were falling off after less than a year.

So, I opted to do it properly and weld on new brackets:

I scraped off the underbody coating and marked the spot welds out:

I drilled out the spot welds using a spot weld drill bit, and separated the old brackets:

I drilled too deep in a couple of places and went through the body:

Over on the passenger side, I found some rust I didn't know about, and decided fixing it was worth the scope creep:

I cut cut away the rust and welded a patch on top. Because of the tight access and the fact that it's not visible anywhere (it will be underneath seam sealer by the end), I just oversized the patch slightly and lap jointed it. I took care of a pinhole I found at the same time:

I plugged the holes on the driver's side also, and chased a couple of holes around.

Finally! I was able to weld on the new passenger side mud flap bracket:

This is where I got to yesterday. It got too late to be using the grinder, so I will be back at it over the next couple of days.
Once the other mud flap is installed, I will fix up the seam sealer and then paint everything. I'm going to paint the butt cheeks with an enamel satin black, and paint the wheel wells and mudflap brackets with some stoneguard paint.