Use oil on this model, no need for grease, and you might as well start right away. If that's the result of three years in a shed, it was this machines worst years ever. Poor thing! You have to take off all plates and covers, start polishing and scrubbing. There are various rust removing products available, but they can be a bit cumbersome to use since you can't have it touch the paint or decals. The chrome is gone in places, but the metal will shine up reasonably well with a good metal polish. When you start to oil, clean and use the machine; rust and grime will gradually dissolve and flush out from gears, joints and hinges. Some people would pick it completely appart, but it can be difficult. You will get far with steel wool, polish, dremel with felt tip, etc. Then start oiling, use the machine and keep on oiling and cleaning. Gradually it will improve. For cleaning and fixing up the exterior the sticky thread on restoring the japanning is a good one.