I found an ancient bottle of Polly S acrylic thinner in my stash. It appears to be perfectly fine. I’m wondering how this would work with Vallejo model paints. Hate to toss it if I can get some use out of it.
It just might work. I suggest that you test it out by mixing them in a small container to see if they are compatible before trying to run it thru your airbrsh.
if you are in the Phoenix AZ area, I’d gladly take the stuff off of your hands, since I still have plenty of bottles of Polly S paints.