and now for something a little more informative...
I tweaked my pinch weld today. First I scuffed everything up around the pinch weld then sprayed the "back" side (side closest to the engine) of it with a few coats of bedliner. Then before it fully dried I used a BFH to flatten the weld. Next I sprayed the rest of that area with bedliner, doing my best to get in every nook and cranny.
I knew I didn't want to cut up the fender liner too much. I've seen some guys use a self tapping screw to pin it to the unibody but IMO the less drilling/cutting the better (one fewer spot for rust to develop), so I used a heat gun to flatten it out.
With the heat gun go up and down this area until it gets soft. As you're working it with the heat gun, use something to start pressing on the plastic. Once you're happy with the fold, hold it in place until the plastic cools. If you spend some time on it, you could actually make it look pretty good but I was rushing.
I don't know if this will cure my rubbing issue* but it's definitely better than before.
*It only rubs when turning in reverse while the suspension is flexed