Thanks for the reply and words of wisdom. You have given me plenty to think about! Since I want to increase the fender width across the full fender my biggest concerns are in the area where the fender joins the running board. Otherwise I think a 2" strip straight extension down the middle of the fender will be simple (not to be confused with easy).
Would love to see pictures as you progress on your endeavor.
Most all of my experience with glass has been in the marine field as well so most of the materials I will be using will be Awlgrip or West system products until I get to the final set up for paint process.