How do I replace or find non-printable characters in vim regex?

Question

I have a file with some non-printable characters that come up as ^C or ^B, I want to find and replace those characters, how do I go about doing that?

Answer 1

Say you want to replace ^C with C:

:%s/CtrlVC/C/g

Where CtrlVC means type V then C while holding Ctrl pressed.

CtrlV lets you enter control characters.