Jeez, all credit to your intentions NedHan... though having been there and done something similar more than once. When I lost my first vehicle so restored in an accident there is no way I was compensated for, all the effort put in let alone the cash I spent.... Long before the days of Agreed Value
Insurance... NOT that AVI guarantees anything matching generalised expectations of it for some..? Sorry if that thinking is a tad on the negative side but may be worth considering to some degree as forewarned can be fore armed..?
As for resale at any future time with thoughts of investment potential.... I have grave doubts on that score. Though as I have typed elsewhere on this forum making a car into ones idea of perfection can risk diluting a measure of enjoyment in actually driving it and perhaps more so every time the PING of a stone hitting the bodywork may cause you to cringe..let alone the shopping trolley scars.. if ..you are ever forced to use your Porsche for an everyday task as the result of unusual circumstances...??? Nah.. no point in parking it furthest away from the door of the shops where no one parks... as on your return you will find that a Porsche attracts other cars to park around it more than fly`s are attracted to the proverbial.... Sorry I have digressed as ever.. )-:
In my limited experience up to early eighties 911`s Porsche sealing materials were pretty effective thus if I were inclined to remove it I would need to be sure that whatever I intended to replace it with would do the job just as well as a minimum, if not an improvement.... Having removed Porsche applied under-seal I was impressed with it`s rubberised qualities which did a far better job of protection from stone chips than the more usual body shoots, or thin coating of stone chip... I suspect the Porsche stuff may be applied hot thus goes on a lot thicker. The problem I had with it was that if it became deeply scarred, corrosion would then work on the scar causing the under-seal to loose grip and allowing water in behind and providing a pocket in which the mix of salt and water was held up against the bodywork and could do it`s worst to spread under the coating... I have posted old pics of such 911 SC corrosion in the recent past.
I suspect the only reason I might have to remove sealer would be if I suspected it was not Porsche applied and may have been used in a suspected repair process that may not quite meet Porsche standards...
On the other hand I have known skilled folk determined to improve either their m/cycles, cars, boats, houses etc. etc. etc. who have done a great job spent loads of time, personal effort and cash in the process, which worked out very well for them. As I have eluded to, I have done a bit of that myself, though sometimes it does not work out well in the long term as material choices can be perhaps more complex than hoped for and given in this case Porsche have been at it for some considerable time gaining expertise in material choices to extend longevity when compared to some other marques...I wonder if it is relatively simple to find matching or better material specs .
Admittedly I have ZERO up to date experience relative to the more recent decision making processes in manufacturing that involve risk management in ever higher degrees, along with other cost cutting processes, dare I mention a certain recent aircraft design...OUCH !!
I wish you every success in your aims, as for their worth... time will tell.. but I think I understand the real value of a challenge that so many of us take on, in which others question our sanity, while they sit on the couch... :?: