How long shall I leave them in soak roughly??

 

depends how bad they are,take them out after a few days and wire brush them,see how theyre coming along and put them back in again,repeat as nec, if theyre really bad then you will need to change the vinegar after a while for some new stuff

 

Cool I thought it probably would be it only really surface rust but thought I would give it a try I will have a look at the bits come Saturday