Hello Tomcat Fan,
It's a very interesting topic.....
We just had a club-meeting last week-end and we were also discussing about this problem.
I've just finished my yf-16 (Hasegawa 1:72) and I've been using gunze GLOSS acryls for the first time (and certainly for the last time....). The colors I've used were the H327 (red gloss) and H326 (blue gloss) and also tamyia white spray and MM flat black.
Now what happened:
I applied a thick layer of a gloss coat called Lascaux (Water based acrylic) and then the gunze colors started to run and "shrink" (almost as you use decal solvent on decals...)