Mix Paint and Cut In Edges

What happens here

Thoroughly mix the chosen paint (likely a masonry or floor paint suitable for concrete) in a bucket using a paint mixing stick or the paint brush itself, as seen in the video. Once the paint is well-mixed and uniform in color and consistency, use an angled sash brush to carefully 'cut in' along all the edges of the stairs where they meet the masked surfaces. This ensures that these areas are fully covered and have crisp, straight lines that a roller might not achieve.

Goal: Paint all edges and corners for a clean, sharp finish.