Like Rudi, My vote also is for Brake fluid. You can buy DOT 2 or DOT 4 oil. About half a lit should be enough to submerge the entire model. Even if it is not fully submerged you can just keep your model upside down for 1/2 an hour then repeat the process again. In some place if the paint has not been removed completely, use a soft old tooth brush. Take care. It is very easy to damage some delicate fittings.
NEVER TOUCH the OIL USE GLOVES always.
Dont drain in the sink. Dispose properly.
You can reuse the same oil for paint stripping. But it takes more time. First may be stripped in just 15 mins. But the 3rd and forth may take upto 1 hr. I use Laquer based. If it is acralycs than it should be faster. I stripped one of my model 4 times recently. It was during my learning process with airbrush. Unfortunately I never managed to finish that one. Ended up in the Bin.
I noticed this process softens super glue. So most of your PE parts may come loose if you have used super glue. so take care while draining. Use a mesh and funel to catch some loose parts, if any
Once you take the model out of the oil do not use water immediately until you made sure all the paint is removed. Because once you imerse the model in water the stripping action by the oil stops.
Check this link.
http://www.amazon.com/gp/browse.html/104-5552226-8382328?node=12991911All the best.