I am no super modeller so my method is pretty simple , I used new small measuring spoons from a lawncare product . The spoons are cut in half , shaped to fit the side of the body and glued on , I then use my Dremel to cut the spoon back to the opening that I want . Then I fill and sand to blend the spoon to the body . You can use bigger spoons for larger fender openings . Hope this helps . Thanks for the nice comments guys .