How to make objects from inside of font?

[Wolfgang]

Hi,

I got some work from a new client and for the moment it mostly means updating his current stuff.

He is using this font "Comica BD".
I need to write a couple of headlines, where this font is in two colors. First the character itself, second color for the filling, which is now hollow.

For the first sentence, I just painted over each character and put the shape to the back.
Now I have to do a couple more headlines, but it gets very tedious to do every single character.

I tried intersecting, slicing etc. with other objects to get only the "inner part" of each character.
It did not really work well though.

Does somebody have an idea or a workaround to make this task easier?
Is there any way to get "only the insides", without having to paint each one individually?

Thanks!