How do I build this body line

Working on my 66 Dart. I have the front fenders off the car. This was a 270 model and I am eliminating the body trim that went from front to back. This left many holes where the clips would go thru the body to hold them on. I have welded these holes shut and now I am working on trying to finish so I can primer and put back on car. At the front of the fender there is a 1 - 1 1/2" wide metal strip that the trim sat on. When welding then sanding some of this line was removed so I need to rebuild that body line. I am adding pics of what I am talking about and I'm hoping some of you members can give me a good procedure for rebuilding this line so I can make it straight and the right height to blend into the fender.
Here are the pics:
IMAG1251.jpg IMAG1255.jpg
Thanks for your help,
Rod