I've been noticing an annoying trend with all my Testors enamels. Even when I was building often I still didn't use the paints fast enough before they'd dry up and I ended up wasting alot of money in unused paint. The first bottle of acrylic paint I bought was in the fall of 2010 when I was building my 1/48 B-24, I can pick it up and in ten seconds of shaking it's ready to spray again. Finding that, as I use up my enamels I've been slowly switching over to acrylics. My only complaint so far was how fast they dry and the problems that come with that when trying to airbrush them, but Tamiya acrylic retarder takes care of that.