At what point do you give up and toss out that old jar of paint and buy a new one? I know the obvious answer is when it's dried up rock solid in the jar. But is there a point when it gets too glumpy or something and it's best to replace it?
I had opened up a couple bottles of paint (Citadel's Smelly Primer and Skull White) which I figure are about 5 years old. The one, I had to stir for awhile because it was thick at the bottom. After shaking and stirring, the consistancy looked good. However, I noticed when I brushed on the paint, there were tiny lumps showing up. I first thought they were like tiny air bubbles, but they wouldn't go away, even after brushing over them a couple of times. I washed off the brush, wiped off the work area and the figure again, but it was still there. I went to using Tamiya White which went on fine, so it's definitely the paint. I tried shaking it more. Placing drops on a palette and added water and mixed it, but still little lumps.
I was thinking maybe my next option would be to toss a couple of BB pellets in there to help mix it up. Would that help or is the paint going bad and needs to be replaced?
Thanks in advance.