New to this forum. I have the odd duck of Mustangs. it's a 1968 convertible 390 2V X Code, only 67 ever built. It is a very original car, 73,000 miles. All numbers matching to include engine block. I have this car well underway of restoration to completely original as born , my question to the forum experts is about the undercarriage of the car. All of the floor pans are in excellent shape and with a very good cleaning the underside is pretty good. The original dark red oxide paint cleaned up and even all of the little drip marks are in tact. the issue is where the undercoating is flaking or has come off. I have be removing any of this that is loose but then I have uneven or what I'll call broken undercoating along with some scratches from scraping. I wanted to leave the underside as original but in order to do this there will be some touch up areas done. should I do this or just completely re-do the bottom of the car? Also, I would be very interested in hearing what everyones thoughts of value of the car after restored. Marti deluxe report shows with options, one of one.