What you say hits a cord with me. I love to work on cars. I am good with major body work, fabrication, welding, engines, painting, etc. I am also 68. I am fortunate to still have good health and mobility, so I can still do what I want. I am currently helping a friend restore a 56 Studebaker Powerhawk. I have often wondered how much longer I'll be able to do this. When I get to the point when I can't do the actual work myself, I think I'll find someone younger who needs help with their restoration and teach them what I know.
