Heres the run down for Tamiya:
Acrylic Thinner- I swear all that stuff is $8 rubbing alcohol. Smells like it, dissolves like it, feels like it. And even tastes like it

I use rubbing alcohol to thin Tamiya paints and they thin the same way.
Rubbing Alcohol-Inexpensive, thins Tamiya Acrylics.
Just my