I bought the case anyway, as I have a Lettera 22 exactly like the one Algebra Girl up there is holding, and we discarded the case some time back when it started to fall apart. (That, by the way, is from a postcard that J's mum sent to us more than two years ago. Absolutely prescient.)
This reminded me that I've been shirking my ephemera posting duties lately, so here is an instruction manual for the Hispano Olivetti Pluma 22, a typewriter we acquired at the end of last summer and has been already featured on the blog.
A soft paintbrush is the recommended tool for cleaning off dust.
The proper way to lift off the ribbon cover (oops, I suppose prying it off from the sides was a rather daft idea...).
Of course it makes perfect sense to clean the typebars with a rag underneath to collect debris... why didn't I think of it?
Cleaning each typebar with a soft cloth. Gilding the lily a bit here, aren't we.
How to disassemble it - you may need to be a tad more assertive with your screwdriver probing, though.
The brush makes another appearance, cleaning underneath the keyboard. Although I have found original brushes once or twice with typewriters I bought, I've kept them more for historical purposes than for actual use. Any old paintbrush will work for cleaning... although the cheaper ones tend to lose their bristles if you are too vigorous.
The final touch - polishing with a soft cloth and a bit of alcohol. No, this won't strip off the paint and make you a shiny Silver Surfer, sadly. For that, you'll need a considerable bit more elbow grease!