I wanted my grandfather to show me how to do it for a couple of years. We also had people come in the shop wanting lead also. My grandfather just wouldn’t do it any more. People think that bondo only last a few years and falls out. I never had any do that in the thousands of cars I did. I have a 67 mustang I did in 83 and it’s still there and not fallen out. also my Buick I did in 87 still good. The reason he didint want to do it is because bondo is so much easier and quicker. People think the lead is so much better but actually bondo is just as good. You are right it is a dying art. Kind of like black powder and smokeless powder. People still use black but 98% of my shooting is with smokeless.