How to carve letters and numbers with a router

What is the best way to paint the letters cut into wood? I'm making national/state park signs using a stencil and plunge router, not sure of the cleanest way to paint the

Easily Carve Letters with a Router

Adjusting the cutting depth on a router

Working in different materials with a router

Carving Incised Letters

Carve breaks raised letters in mdf - Onefinity CNC Forum

Individual Custom Flat and 3D Letters and Numbers

Duckworks

Wonkee Donkee Trend

Adjusting the cutting depth on a router

Lettering Carving – Carving by numbers

What are the different methods of guiding Trend router cutters?

What is a Trend router cutter?