How to add a consistent ridge on a extremely curved surface?

[Anonymous]

Sorry if my question was confusing, but I was unsure on how to word it. (I'm new to all this.) I've been having a lot of trouble and would appreciate some help. What I am trying to do is add a sort of "ridge" to an armor piece. It needs to be consistent in size. I've been having trouble because of how curved the shape is. Any help is appreciated. Thank you!

Here is what I am trying to achieve:

And this is what I have so far:

[TrippyLighting]

Turn auto-tiangulation off in the Preferences.
Then if you're lucky this comes in as a quad mesh that you can then work with in the sculpt environment.