My dear Jamshed Bond Sb...you're quite entitled to voice your opinion, as to how I've "ruined" these cars...but to the best of my recollection, I happen to own them, not you. That would make your criticism - if it is not accompanied by constructive advice and suggestions - quite irrelevant. No wait...it would actually make your opinion completely irrelevant. 
I'm sure all of the Impalas that you own are beautifully painted and painstakingly maintained and immaculately appointed. Clearly, to have such an emphatic opinion about what constitutes the "ruination" of a vintage car, you must have several - if not dozens - of such cars on the road. Right?
This thread in the DIY Section is actually meant to highlight what you CAN do with some of these old barges. In your case, Sir, I'm quite certain it can serve as an inspiration of what to NOT do with such cars. Even if that be the case, the very existence of this thread is justified.
By the way, Sir...exactly WHICH vintage car do you drive? Inquisitive minds would like to know. 
Best regards.
Fouad.