Cleaned the Skywriter and it types much smoother. Only thing wrong was 1 of the screws that holds it in the case is not gripping.Will work on that. Lots of grime came off. There is some glue residue from an old label that I did not want to be too aggressive about.
The Sterling looks like it came from the factory, and types that way too. Couldn't even get any dirt off the outside, it was so clean. The case doesn't have a mark on it.