Dawn Power Dissolver. It doesn't have the problems with loathing water like Dettol does (and the smell, egad), and you can just heavily spray the model, put it in a container and leave it, and then take the paint off the next morning. (It's called Fairy Power Spray in the
UK, and Dawn Power Dissolver in the US). However, I would be remiss not to link you to our very own
How To Strip... article.