Royal Futura 800 Typewriter Plastic Key Top White Crud Removal Cleaning Servicing by [[Phoenix Typewriter]]

For the white, crusty out gassing (or off gassing) on plastic typewriter keys, Duane recommends a round or two of Simple Green with a stiff bristle brush. Follow this up with a scrub down using WD-40 to displace the water from the Simple Green and then follow up with denatured alcohol, which is safe on plastics, and a wipe down with a rag to dry.

Revisiting my first typewriter restoration... by [[Just My Typewriter]]

Interesting to see someone with some broader experience looking back at what they'd done before and describing how they'd do it now.

Olympia SM Typewriter Wash, Scrub Clean Lid Cover, Restore Paint by [[Phoenix Typewriter]]

Simple Green gets off most dirt and nicotine as well as some White Out. Duane uses Nu-Trol Control Cleaner (for electronics) as a mild specialty cleaner for tougher White Out cleaning.