Refinishing Platner chairs  

So, I have 10 early 70's Platner Chair that for some reason were painted white. The earliest memory people have of them, they were always white.

I am thinking of keeping 6 and selling 4. My questions are:

Do you think it will diminish its value if I repaint them bronze, update upholsteary, etc.

Should I keep them white, even though it is not their original color?

I guess that basically I am wondering whether it will be in detriment to do anything to them and try to make them look as good as new, even though they are vintage.

I should point out, that they paint has its defects and it is not really white, they are more of an eggshell color, and some are in pretty bad shape.

I am aware that I cannot sell them as fully vintage if I repaint them, but will also have issues with selling them white. I am a firm believer in letting the age and patina show, but also painfully aware that this chairs were never meant to be white,

Any thoughts?
<img class="wpforoimg" src=" http://d1t1u890k7d3ys.cloudfront.net/cdn/farfuture/P5LQ7Mes56UtsjrAEU1BK