RB8,

The late, great George Aldrich recommended Rislone Engine Treatment - the green stuff - and reasonably air-tight storage. I have squirted some Rislone into stored (edit - spelling) engines, flipped through several times to distribute, and put into snap-on lid coffee cans - usually in a zip-lock type baggie. They are loose and free after a few years neglect. AND, the Rislone seems to clear quickly and easily on first start after taking them back out...

Seems just as good for plated, non-ferrous cylinder/aluminum piston engines as for iron in steel traditionals...