So you don't like patina, that is your opinion and does not help the original question. I am keen for helpful answers.
For some of us there may be a reason to keep patina, or the history of the truck. For me, I have a truck that I got from my father. I have no idea how it looked in 1941 when it was built, I was not there and would only be imagining. I do know how it looked in 1974 when Dad got it. I even remember how it looked in 1977 when I started driving it. As it has deteriorated little since then because it was kept in a shed I would like to keep the patina. It is not for anyone else's benefit but mine only, because I spent many hours as a kid in that truck. That is what my memories are, not the shinny looking thing that was made in 1941. It may not have been that shiny for all I know.
This may even seem strange that I am going to leave a dent in the mudguard and a crease in the bumper that was not repaired properly. I have included an attachment that explains how the dent got there.I will even leave the scratched name and service number in the dash that Private Shepherd presumably did sometime in the early 40's after the truck left the factory.
So I am keen to here of ways to protect an old truck from deteriorating so I can enjoy it for me. I don't wan't fake paint or clear coat. For those who have no interest in this topic or nothing positive to add please don't try and push your opinion.
