I've used Mr Muscle Oven cleaner very succesfully on lots of cars. It comes out of the can as a foam spray, I leave the body to soak in the foam for a hour or so and then do a similar process as detailed above in the excellent tutorial and then repeat if required. I used to use brake fluid but heard some horrible stories about it and then found out about Mr Muscle which I've never had any problems with. It seems to work best on cars that were handpainted with Humbrol enamels. One final thing, Mr Muscle will make you cough/choke if you don't wear a mask!
Thanks,
Pete
Thanks,
Pete