Dear George and mid-60s Buick caregivers,
Hmm, this forum is unusually quiet for a weekend. Most of the gang may be preparing for the first Buick Club of America 65GS.com division meeting which is next weekend. So hang in there, you should be getting more advice soon.
As a family, we have always taken very good care of my trusty 1965 Buick Special wagon, so she has never needed the kind of restoration you are taking on. So sorry, I'm certainly not the person to give you any advice.
Cheers, Edouard