Acrylics can be shifted with Windex/Ammonia based cleaners, some on your side of the pond also use 'simple green'
UK users have Windolene(ammonia version) & Fairey power spray, or a more drastic solution of Mr Muscle Oven Cleaner....
Put parts in sealable plastic bag & soak parts in goop of your choice, Observing health advice! Scrub gently with old disposable toothbrush & toothpicks, resoaking if necessary. Some cleaners will also loosen detatch glue bonds.
With Enamel paints, I use Fairey power spray, or Mr Muscle Oven Cleaner.... don't know the US names, sorry.