Flexowriter lubrication

None of my recent posts have made it into the digests (probably because Hewlett Packard sent me a security certificate) but most topics are now stale so I wont bore you with things like 160 column cards, but I will retry this one: One of my Flexowriters has just had its mains cable replaced and then turned on for the first time in about 25 years. Apart from surface rust and the printing levers not going back down, and the ribbon breaking, it seemed to work fine. Does anyone know what grade(s) of oils/greases to use on which parts? The rubber parts and carriage return band even seem good but would probably not appreciate dunking the whole thing in oil. I guess WD40 or "3 in 1" oil would be out because I've been told they both leave a residue. I have not seen anyone selling 'light machine oil' for a few years here in the UK but there must be a modern version surely.