I installed a urethane roll pan on my 1999 Dakota R/T and would like to know the best method and material to use to fill the gap where the urethane roll pan meets the metal quarter panel? Bondo would crack, maybe fiberglass or some type of fiberglass filler would hold up?

 

its not gonna work bud. if you wanted to mold it you would need a steel roll pan. . . you could do it but in a year or so it will start to show a line where the gap is. . .