Rehabilitating Cox engines
So, I have a couple of 049s which haven't been used in years (decades in some cases... I don't get out much) and they've pretty solidly gummed up. I'm wondering if there's a method of cleaning them up in such a way that if they're not used for a while (like over a winter or two) they don't get sticky again. I completely cleaned one up one time using old glow-fuel as a solvent, but again after a few years of disuse this one is sticking up again. Perhaps glow-fuel isn't the right solvent, since it contains castor oil, which I guess is the stuff that's solidifying over time?
Any suggestions appreciated.