Hi Chris ,
Yes Tamiya 's brand of Lacquer thinner . I used to use what ever brand the hardware store had/paint store and found that the paints don't stayed mixed for very long causing a few troubles while spraying . I still use the hardware store brand for thinning Humbrol and Testors Model Master paints . Never had an issue with separation . I also use their regular thinner as well X20a .
Give the Tamiya Lacquer thinner a try Chris , one will last me a long time . I don't use it for cleaning the airbrush , store brand works a charm .
Terri