Step 1: Disassemble the model. Remove anything that is not brass.
Step 2: Submerge the model in a 50/50 mix of Original Pine-Sol and water. I let it sit over night.
Step 3: The paint flakes off easily. I use an old toothbrush to get the paint out of the tough corners and crevasses while rinsing with clean water.
Voila! Yessir! Voila!