Will alcohol based paint ruin my brushes?
It depend on your brushes and if :


they contain glue or not to hold the hair
the hair are in synthetic material (should not be your case since you have kolinsky sable brushes)


In both case I would not use turpentine or other solvent on the brush since it will damage the glue and hair will go out and if the hairs are synthetic it will damage them. 

The safest would be to have an old brush of the same brand of the one you intend to wash and make a test on them.