Post by Mark Cerwyn,
1. Obtain a bowl or a pan that is roughly the size or larger of the parts that you intend to clean.
2. fill it half way (or just enough to cover the parts) with hot tap water.
3. Obtain some plain white (distilled is preferred although not really necessary) cooking vinegar and add some to the hot water. Plain white vinegar should be available locally in local groceries etc.
4. Obtain some Baking soda (baking powder/sodium bicarb) again, this should be available locally at the groceries. (I use the "Arm&Hammer" brand)Now, take a small amount of the baking soda (a "pinch" will do) and drop it into the water/vinegar mix. This will cause the vinegar/hot water to foam and expand. So try to do this in a container that is tall enough to contain any extra spill over.
Try it i think that you will like it
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Wanted to buy: MGC Sten MK3....trades?(still)
MGC MP40 Marushin MP40 Nakata MP40 TRC MP40
Modelgun manufacturers, past and present:CMC,CAW,Hudson,HWS,LS,MGC(R.I.P. 1960's~2007) Marushin,Marui,Kokusai,Shoei,Tanaka and Western Arms