Just like when you buy paint to paint your house, do you know you should add a cup of water to every gallon??
I find that with water, the paint doesn't dry as fast. With lacquer, it drys really fast and has a tendency to go on rough, but most people add a clear to the mix, which I like to do at the end.
Alcohol works just as good!!
My biggest issue with Tamiya is that they really don't or won't say what their paints are based with. You can smell the alcohol when you open them up, but they end up saying, "thin with our thinner".
My issue is, why thin with what you are selling to use as a brush cleaner. If you look at the mix bowl when you add the paint, then the lacquer, see what it does to the paint. It separates it.
Does it work, yes. Is it the right medium, no. But when you use it in an airbrush, it works great, which is why I use it to clean.
Also, I'm not sure if most people do this, but you should remove the tip from your airbrush and run a small bottle cleaning brush dipped in thinner through the gun to clean out the paint. Just running a cleaner through does not clean 100%............... My tip for the year