Eastman Chemical (Tenite) wasn't the only mfg of cellulose acetate plastic though they were the largest.
It is the wood pulp, and sometimes cotton fiber pulp ingredient that causes the white age marking and bloom on the items made from it as Keith points out.
Plastic eyeglass frames were/are another common item made from it and another one that often suffered the white plague especially on the temple pieces after some age and use.
I've noticed many 50's and 60's Winchester 22's with their plastic butt plates have the white powdery stuff clinging to them if they've been hanging around untouched for a while.
You can usually clear the piece of the stuff with most any of the procedures above. But it will come back again later it seems. Temp and humidity conditions can help or hinder it's return of course.
The wood pulp ingredient and the acids and acetone used in it's mfg'r are all part of what it's made of, there's no getting around that.
