Can Park Tool CG-2.2 kit work with the bike upside down? I've recently acquired a new bicycle with coaster brake and internally geared hub. 

Naturally, I'd like the bike to last as long as possible. Unfortunately, the local weather seems to be stuck in "eternal autumn" mode, with rains at least twice a day every day, low temperatures and salt on the roads. Local terrain produces lots of mud and some sand as well. All this produces quite a bit of dirt on the chain, which I'd like to get rid of. Unfortunately, I don't really have any space for a workshop, where I could remove the chain and clean it properly, so I was thinking of getting say Park Tool CG-2.2 kit and using that to get rid of some of the grime. In the instruction manual for CM-5.2, it says that the bicycle should be pedaled in reverse during the cleaning procedure. This seems impossible with a coaster brake, so this leads me to my question:



Can I just turn the bicycle upside-down, so that wheels are pointing up, and then use the CM-5.2 by pedaling forward?
Yes.

All those tools require is that the chain moves through them. They do require the chain move through in a particular direction so you will probably find that you end up with the handle on the bike side of the chain rather than on the outside, which will be mildly inconvenient. But it beats not being able to clean your chain at all.

Here's what I do, I took the handle off and set it up so the rear derailleur is pulled forward far enough that the chain cleaner can rest on the mech rather than hitting the idler. That lets me pedal with one hand and have a hand free for wiping the chain, chainrings, idlers etc. I also find disposable gloves essential for this, there's no chain lube that's good for your skin.



You could do the same thing with the bike upside down, but you'd need to rearrange things a little.

The question body makes it clear but the original title didn't, so just in case it's not obvious, if you have the tool upside down it will not work - there's a reservoir full of fluid at the bottom, if you invert it that won't hold the fluid.

(note that the above photo is a bit of a cheat, it's of a 406 wheel bike with hub gears so the derailleur is used as a chain tensioner and the chain only runs over one idler. But I do the same thing with my 622 wheeled road bike)