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For that amount of thinner is really worth trying to save and reuse it? Just seems bit of false economy in the long run.
Well, Alex, if it's just for my brush yes. I think using it in my brush is fine. I don't think the inside will turn green it's just muddy look to the thinner. I'm not using it for anything else but cleaning the brush.
So instead of getting another 8 dollar bottle of Tamiya thinner because I am using it rapidly with the airbrush and cleaning/ thinning paints I can use that again and again for cleaning.
Of course I use clean thinner for thinning paints. There are three other little things like that... that was for example..........