Wire brush and oily rags.
If you read the earlier Hebrides Shed item you might recognize one or two of the bits in the images above. They are a sort of before and after collection of cast iron lumps which will shortly be re-assembled into a hopefully working Hattersley loom. All had an encrusting of rust, ancient grease, oil, filthy old wool and general muck but, thankfully they appear to have survived and after liberal dosages of various cleansing and easing agents plus some brute force all the seized moving parts now seem to function. Another month or two and we might have this weaving !!