Stinky typewriters can range in "smells" from chemical oils and solvents, to nasty pungent perfumes and colognes, to funky cigarette smoke that permeates the wool like insulation inside, etc, etc.
Thus:
Varying degrees of cleaning and refurb:
1
Complete body part removal, casing, platens, etc, all plastics that can be removed, etc.
Then, chemical wash of the innards with air compressor and brushing as needed, followed by denatured alcohol and further brushing and air blowing.
Then, air dry, left out.
2
If the typewriter is still stinky after the above, then up to several weeks in a very large rubbermaid bin with lid, stuffed with new crumpled up newspapers.
3
The toughest odors to remove are colognes and nasty perfumes, as well as cigarette smoke, or worse, cigars, which pervades everything.
I hope this is helpful.
The Denatured Alcohol really helps get rid of the chemicals and oil smell, "after a thorough solvent wash".
k