factory undercoat question

in my opinion, there is no such thing as "over restored". the car lasted 30 plus years the way ma did it. if you are going to restore one to go to a concour event or tour the concour events for points toward a national show title, then sure. just dont ever plan on driving it. ever. if i'm going to spend the money, and put in the effort, my job on the car is going to consist of making it last at least another 30 plus years. otherwise why bother(that is why it's called restoration). i firmly believe in totally sealing the body up. by whatever means necessary. i mean full prime, paint and, undercoat all of it. like i say this is my opinion, and i've been told i'm, well, nevermind. i believe in the do it once, and do it right. it's cheaper, and costs less in the long run.