ORIGINAL: foosball_movie
So will the anitfreeze method require removing the engine and soaking in heated antifreeze? Or can I brush some antifreeze onto the engine while it's still mounted and then heat it with a heat gun then use a toothbrush to scrap off the varnish?
Most people use an old crockpot on low heat and soak the metal parts overnight, make sure there are no o-rings etc. An old toothbrush will get any remaining varnish off. There are threads on it in glow engine forum or search for it.