Filling navpod holes

[FoxyCal]

I ended up going with a Navpod for my new MFD and found one in a consignment shop. It’s new but precut for different display. Fits almost perfectly but two of the predrilled holes peek out from the MFD edge. Since I won’t be using them I want to fill them to match as closely as possible. Any suggestions on material/process?

[Spot]

What color/material is the face?
Epoxy with microspheres and fumed silica would make a good patching compound as long as the face is not plastic. You would want to put a drop of paint over the epoxy so it does not yellow. Or paint the whole face after the holes/edges are patched.