Epoxy primer and Ford New Holland paint.

Thought I'd give you my thoughts on your question. There is no doubt that epoxy primer is a very good primer to use whether on bare metal or painted surfaces. It will seal out the moisture and help prevent rust. The question that needs to be answered is this; is your Ford paint going to be compatible with the particular brand of epoxy primer you use? I have read that some of the experienced men on this site have used other brands over epoxy. But, it is an iffy situation. Most if not all epoxies use a chemical bonding rather than mechanical (sanded). There is a window after application in which the top coat must be applied so that the chemical bonding occurs. If this is not met you must sand and re-primer. Perhaps doing a test on some scrap sheet metal or talking with your local auto paint dealer. There are probably some men that can offer some more information.

One thing that I would consider if I was contemplating making my tractor a parade tractor vs. working tractor is what am I going to do to it to make it a parade tractor? If I was going to restore it, I would not bother using an epoxy now but save the good paint for the restoration. Between now and when your restore it you will certainly put some chips in the paint. Your tractor will certainly survive a few more years with a coat of Ford primer and paint. Just my thoughts. Hope it helps...