Quick question... I use MM enamel paints; I just found a second jar that went bad. Went bad defined as: pigment separated and DRIED out at the bottom of the bottle, solvent congeled (like gelatin) on the top. No liquid interface exists anymore. No amount of mixing will help (all the contents of the bottle are solid or gel like semi-solid). added thinner, even lacquer thinner... I can get some of the pigment back into solution, but as a colloid, suspended particles. In other words, it does not "paint" (adhere) to surfaces. Both bottles were first opened about a couple years ago, used a handful of times, and always sealed properly. Kept at room temperature. Other MM enamel bottles look fine; the pigment DOES sediment with the top layer/solvent remains liquid and you can easily mix and use the paint.
any ideas what is causing this??? I never had the old testor enamel bottles go bad on me, even if stored for years... maybe a tad dry, but add some thinner and back in business...this one... nothing goes back into solution, stays like jello. 