Quick little update.
The fenders released quite easily. I went back and sanded down / smoothed out the seam edge, not pictured.
I did manage to work on the driver's side fender, but didn't quite "finish" shaping it. It needs a little more filler to smooth it out. I'll post pictures once I've finished shaping it.
I'm still sitting on the fence about whether or not to shave the bumpers on my beetle. I prefer the deleted bumper look, but I'm worried somebody might bump me one day just tear up the body of my car. Hmmm... This is really the last thing I need to sort out body work wise.