I'll be the first to say that a true correct restoration is one that is done just like the GM did - mistakes, errors, ommissions, oversprays, wrong gaps, etc included. Correctness means 'no better, no worse' than the day it rolled off the dealer's lot. There are many who actually like them that way, not the prettiest, but that's the way they came. I usually don't understand how someone will put some crayon markings on a car - even though they too look ugly - but won't leave some orange peel in the paint, or put overspray onto the firewall
But, that's what makes the world go 'round!