Newer metals are better than older ones, HSS, HSA and others used in different area of the body I don't think there were any high strength steels used in our cars. Also the paint/anti rust products used at the new factories are far superior to what was used in the old days. Also depends on where you live. Michigan? or somewhere that they don't use salt and sand on the roads in the winter? Working out dents and collision damage is a whole different animal though.