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Posted by Steve on January 17, 2025, 6:13:21, in reply to "I only airbrushed it but..."
If not too old a "rubbery" top layer can be removed leaving a "recoverable" base. 
Previous Message
...if the pigment puck at the bottom had turned rubbery it's toast and cannot be brought back.
That said I always used the stinkier thinner as it had the correct tail solvent, ethylene glycol, and the paint just behaved better. You cannot just use water as the acrylic resins depend on the correct tail solvent for the curing process after the water evaporates. Previous Message
I mostly use Polly Scale but I do have some aged flat Testors acrylics. I recognize the fact that everybody’s pigments settle into gunk at bottom of bottle, my point being I am trying to rescue these aged Testors acrylics.
Testors offered two types of acrylic thinner. Testors Universal Thinner which they offered after their purchase of Floquil/Polly Scale. I believe this to be merely distilled water. The other Testors acrylic thinner offered far earlier has a distinct chemical odor and came in a 2 oz bottle.
Which of the two thinners should I use to restore these old Testors acrylic paints? I am a brush painter used to the smooth flow of Polly Scale with no brush streaks. I would like to attain the same consistency but have even coverage. My experience with Testors acrylics when first introduced was not a positive one and I abandoned these acrylics for years. I suspect the chemical odor Testor acrylic thinner was made for the airbrush but not the brush painter.
I also have Testors Acrylic air brush cleaner and can state it certainly cleaned my brushes of Polly Scale acrylic paint in a quick hurry.
Any help will be greatly appreciated
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