Run all fuel out, and after engine dies keep trying to start a couple more times to make sure no fuel is left. pull air filter and glo-plug and give a couple of shots WD-40 or after run oil in both the glo hole and down the carb and replace plug and filter and you should be good to go. Remember that alcohol attracts moisture so try to keep inside house if possible, rust shouldnt be an issue if WD-40 is used as I said but why take chances. Use compressor or something to blow crap out from around glo hole before pulling plug out to avoid crap in engine.