If you want to scrape the ways then a scraper is the best way forward....made from an old file or similar.

Requires manual dexterity and mastery of hand tools....not for the office workers :naughty:
No need to get personal.:heehee: Office workers can very usefull....making tea, sweeping the floor etc.

You could try just lapping the parts together dry (i.e. degrease it and rub). Cast iron is fairly abrasive stuff so a few dozen cycles should polish the machining marks.

BTW Use proper 'way oil' e.g. Mobil vactra. (Keep that old can of Duckhams for the car use only ;) )
Unfortunatley its not just machining marks, there is a proper lump that needs removing. Still I'll give it try.

The best tool to scrap it with is a grinder......
Is that a typo? or did you mean scrap it