I wouldn't bother with a deep fat fryer, I can possibly see it working on oil based paints but there are loads that aren't oil based.
This subject has been covered many times over the years on Tamiyaclub.com with many options covered. Do a search in their forums and you will have plenty of pages to trawl through, a lot of it I wouldn't recommend as it will destroy your body.
The best stuff has to be Delta Activator or Eliminator depending on the paint used
http://www.tamiyaclub.com/forum/inde...showtopic=1572
Something that's easy to get hold of is nitro fuel. Safe on the body and rubbed on can loosen paint quickly but tends to take a long time to get all the paint off. Be aware there are a lot of paints are fuelproof by design.
Other alternatives that are sort of okay (but I wouldn't recommend any of them!) if you are careful are brake fluid, paint thinners and nail polish remover. They can be rubbed on and wiped off straight away, which isn't the most productive way of removing paint. Leave them on by soaking them and they will attack the body, making it cloudy and brittle. Some have supposedly had good experiences of these depending on very particular versions and conditions, for example brake fluid is safe in cold conditions (doesn't shift the paint though) but in warm weather the chemicals are more active and destroy bodies, but they all will irreparably damage pure polycarbonate. If a body goes cloudy the fluid has attacked the plasticisers in the polycarbonate and in extreme cases shells treated this way have been known to shatter in an impact.
Currently experimenting very successfully with De-Solv-It Graffiti Remover
http://www.screwfix.com/app/sfd/cat/...45293&ts=36494
Seem to be fine on bodies and does dissolve the paint as well. A bit trickier to use than Delta as it is a gel rather than a liquid so if you soak it you have to put the body in a bag to stop it drying out but does seem to work well and more importantly is safe on bodies.
Don't try any other graffiti removers though, they either aren't powerful enough to attack the paint or are so powerful the body will shatter into tiny pieces before the paint comes off.
I have been through loads of these different solutions and have destroyed several bodies in the process (the best was a graffiti remover that was so strong you could see the plastic cracking and melting right in front of you) and the De-Solv-It remover certainly looks to be performing almost as good as Delta Activator, the only advantage with Delta being you can just leave it overnight and come back to a clean body.