Mixed paint shelf life

I can't speak for Tamiya but I've mixed MM enamels then gone three months or so till use. Much longer than that and I got some thickening, not a healthy thickening like as if thinner evaporated off. Acrylics ( again not speaking of Tamiya) seem to hold out a little better. None the less, if I don't think I can use my mix up in a few weeks time I mix as I go.

Mixing as you go is the best answer. But, I've had small amounts of Tamiya flats that were thinned with alcohol that I left for several years that when stirred up shot just fine. I don't know if the composition had changed or if they would just fall off a model but they didn't clump, they mixed up like new. They were stored in used Tamiya bottles that sealed tightly. I didn't try masking over them or anything, just put them in the brush and sprayed on a sheet of plastic because I was curious to see what they would do. Some were probably close to 10 years old. They were in the back of a drawer and I had forgotten them. So, I doubt that's what you're planning on and I can't guarantee it but you'll probably be ok.

Thanks. I've got a empty bottle  I'll probably just mix as I go. I was just wondering in case I mixed to much. I don't wanna waste a whole lot. None if I can I don't have a true hobby shop that's local. So everything I get I have to order and I don't like the shipping cost on just a few bottles that I order. I could use that as a excuse to order another model but I don't think the wife will go for that too many times lol. But again tks guys for the info. Still learning about the hobby 

Depends on how long each build takes.  I usually finish my projects, using Testors enamel.  However, for paint mixed for longer builds I tend to mix paint for the next build, and clean out the old build.  I think Testors enamel already mixed goes bad faster than most brands.

I sometimes tint colors or mix colors, so it is important to mix each color I use early in the build, with enough to complete the build, and that usually works.

 

Thanks. I've got a empty bottle  I'll probably just mix as I go. I was just wondering in case I mixed to much. I don't wanna waste a whole lot. None if I can I don't have a true hobby shop that's local. So everything I get I have to order and I don't like the shipping cost on just a few bottles that I order. I could use that as a excuse to order another model but I don't think the wife will go for that too many times lol. But again tks guys for the info. Still learning about the hobby 

If you are talking about your mix just being adding thinner with a standard color then I'd mix as I go. If you are talking about mixing a color from others in an empty bottle, I do that often. Just did it for Navy WWII Blues for the tricolor camo. I have done it with other colors as well. I use Tamiya also, any paints I have mixed and put in an empty Tamiya bottle that seals well have held up great. Others I mixed in different type bottles are dried up and useless. Good luck.