I am in the process of a near frame off restoration of my 1951, 4100, 5 window, flat bed, dump. The question is, should I have the frame dipped, (complete frame off) or should I derust and go with Por-15. The manufacturer contends that when using Por-15, dipping or sand blasting is a waste of time. This truck is not intended to be a trailer queen, I want a show truck in the front and a weekend dump truck, flat bed in the back. Not having to remove the hoist and every leaf spring would be a real time/money saver. If in the end there is no real benifit to completely taking it down, then why should I. Any thoughts would be appreciated.