Inside stroke (?) for fat letter forms
I want to stylize some fat letterforms with what I'm calling an "interior tracing". Here is the concept done in pencil.

That is quite messy (because it was done with pencil). What I'd like is a very neat & tidy line. And I'd like to be able to apply this technique to other fonts, including some fat "script" types, where the lines would have to be quite a bit more complex.
Can someone describe a technique for doing this?





