that's awesome, I did the same thing. Over the course of 10 months & in 3 different phases I knocked it out piece by piece. The only mostly accessible chunk left is the inside of the frame rail where all the brake lines run, there was no way I was removing them for that but in the future if I replace all the lines for some reason I'll hit it there. In the meantime it just gets drenched in Fluid Film, same difference...
Curious where you got the fender, did it come bare/how did you get the paint on?
I found it on Craigslist and it was the right color and in good shape.