There really is no reference manual other than Jerry McNeish's Book. If you don't have it I recomend that be one of the first things you buy. http://www.z28camaro.com/publications.html
It will give you the correct finishes on everything.
As far as over spray and etc... you are going to have to carefully clean and see what you find.
There are alot of very good threads over on the yenko.net site showing highly detailed restorations from the Super Car Workshop among others... they are very accurate in their replication of returning cars to how they find them... paint runs and etc on firewalls and sub frames etc.