After eating dinner, I decided to try lacquer thinner for the Gunze Sangyo paint. This was my final post in the finescale.com forum.

EUREKA!! The lacquer thinner worked!!

Im so stupid for not trying the lacquer thinner first. For some reason, I thought it would work just like the mineral spirits (they are both for oil based paints, aren't they?)

Conclusion: Lacquer thinner works for Gunze Sangyo Mr Color. Mineral Spirits work well for making addictive-smelling clay.

AND experimentation is a good thing.

Just the thought of finally using my brush after a long time excites me. Thanks guys!!