Kind of like racers tire softener that works great for awhile, but leaves the rubber dried out, cracked and rotten in the long run.
Any resident chemists here?

What do we add to the Acetone to act as an emollient to the dope? That is the question.

But, first i suppose we need to know the composition of the dope, and i am under good advisement that there were several different types used by Altec/WE depending both on vintage and application.