First empty all fluids... remove the bars and chains, and then use a vacuum sealer to seal the bars in a bag after cleaning. Soak the chains in a mixture of bar oil, Pennzoil 30wt, and Astroglide for a week. Then vacuum seal those too. Oh... while you're at it, remove the sprocket assemblies and spray them off with Easy off oven cleaner... then vacuum seal those too...
Now remove the mufflers and carbs, and seal up the ports. Remove the ignitions and then install an old spark plug in the holes. Vacuum seal the good spark plugs after a thorough cleaning with a toothbrush. Now you can pressure wash the powerheads. Or huck them in the dishwasher. Don't let your wife catch you huckin' saws in the dishwasher. Bad ju-ju...
After the pressure wash/dishwasher ordeal, you can reinstall the mufflers, carbs, and ignitions. Now you need to put some sort of oil in the cylinders to keep them from rusting... a good 2 stroke oil will work. Just put the pistons at BDC and fill them up through the plug holes. Don't forget to reinstall the plugs!
Now you can put a fine coat of Turtle Wax on the saws. Get into every nook and cranny... Also a little Never Dull on the cylinders really makes them "pop".
Since the powerheads are bigger you will need some of those "Spacebags" or whatever they call them. So you can put the saws in and vacuum seal them as well. Keep them in a humidity and temperature controlled room...
EZ PZ... only takes about a month for 8 - 10 saws...
Gary