From what I can see, your friend is doing very good work, the only suggestion I can make is to tear up the fenders alittle bit with a lighter and an exacto knife, and a dremel tool. I would suggest using the dremel tool to start with, because you can completely ruin a kit with the lighter method if your not careful.
PS>He really dosnt need suggestions, lol his work is definantly better than on par with some forum members, I dont want to name any names, It might make AIRBRUSH Feel singled out (thats me)