Check this out guys, before and after photos of the cone piece of the accelerator linkage that connects to the carby. Before After. sorry about blurry pics, but you get the idea. It's a process called "Electrolytic rust removal" get a plastic bucket, (don't use a metal bucket, it causes all sorts of problems) make up a solution based on 4Litres of water to 1 tablespoon of washing soda. put it in the water and stir it to dissolve. You then get a low voltage battery charger or DC converter, about 9-12 volts is perfect, if you don't have one you can use a 9 volt battery, attached to leads. Take your NEGATIVE lead and attach it to the object that needs the rust removed, it must be fully submerged in the solution with good connection contact to work properly. now take your POSITIVE lead and attach it to something iron, a nail seems to work fine. If you happen to have any stainless steel lying around use this instead, the iron tends to get eaten away quite fast. you should now have both of your objects submerged in the solution but not touching. (turn the battery charger on ) The time needed to clean the object will depend on its size, and severity of rust. I left this part overnight. This process works on surface rust only. When your done your once rusty object will be black, take a paper towel and wipe it,the black should come off showing the shiny metal beneath. if it dosen't come off just put it back for a few more hours and try again. Hope this helps in some way, Happy rust removing. Cheers - Rhys.