69 dart roof

You must have had a vinyl roof. Bought a 69 Charger back in 86 that had the vinyl roof removed with the resulting rust holes especially along the seamed area. I carefully sandblasted the roof and used Tiger Hair (filler with fiberglass strands in it) to fill the holes. Sanded it smooth, primed it and a couple coats of original color cream and it was done. Parted it out a few years later due to other serious rust issues but the roof was still holding together with no problems. I recommend the Tiger Hair or its equivalent.