[CSHADES]

You need to make the frame fit the truck first before anything else. I would suggest painting it. You can always do some fake patina on it if you really want to. I don't remember what color your truck is/was but what I would suggest is spraying some primer on the frame then whatever paint is close to what you want, then after it dries just scuff the paint until you break through to the primer. it will have protection on the frame but still look older than what it is.