[Frank2056]

I have yet to find an acrylic paint that isn't dissolved or softened by denatured alcohol; it works faster than isopropyl with much less scrubbing.

 

[Frank2056]

If nothing else your post is an advertisement for the acrylic paint you used. The ammonia should have just stripped it clean.
There's always pinesol and/or Easy off

Be careful with the Pinesol - it can soften styrene.

Testors Acryl will come off with denatured alcohol; if there's paint stuck in a deep detail, hit it with an old toothbrush and some denatured alcohol and it should come off.