Lets see, I used brake fluid, usually works in about 12-24 hours.
I also hear Pine-Sol and water works too.
Get an old toothbrush, and some cotton swabs to remove all the excess paint that will be loose on the model.
Also, if the mini\'s are plastic be extra carful, and clean them well otherwise the pine-sol or brake fluid will eat them over time and it won\'t be pretty...
Ahh! It\'s a herd of four legged slugs! :|~