[RichardT10829]

yes and yes. my findings are the larger the item you will require more solution both of which will add resistance to the current.. same with the more powder added the more potent the eletrolyte becomes (but drains more juice in the process). if you keep the same current on bigger items it will still work just a lot slower

so with that in mind for the larger track sections iam going to use my arc welder.

you have to be careful when using big power supplies as you dont want to boil the electrolyte....not really a problem here in the North of england as its so bloody cold ! a chap in Australia used a power supply from a photocopier (24v) and in the summer months had a refrigerator core wrapped around the bucket to keep the solution cool.

thing to look for.....as simple and low tech as it sounds, as long as you have a steady stream of bubbles fizzing from the item your derusting (not violently though more like a glass of soda) then you have enough juice....it may just take longer to get the same results.

one thing i didnt mention was you can keep re using the solution as many times as you like all be it becomes a sludgy mess....its the anodes you will go through

also make sure your positive dog clip does not get submerged otherwise you will find it gets eaten away.....the negative does not matter and that can go right into the solution.

you can put multiple items in as long as they are linked by wire. just make sure you dont short out cathode and anode. you could put copper in and coat the items in copper sulphate so they dont rot......but i have not researched fully yet.