Measure for the center line by making a chalk line and pencil marks.
Lay the tape with two people to line it up perfectly, keep measuring while taping to keep it uniform. Fold the tape over at the end to make a tab so it's easier to pull off.
Be sure to tape the sides of the steps because once the coating begins, the job can get messy.
Before the final coat is applied to the concrete, scrub a primer into the concrete with a hand brush. This primer coat serves two purposes: 1) It supplies a great layer for adhesion, and 2) It creates a barrier between the final coat and the existing concrete. If any of the moisture from the final coat gets absorbed into the existing concrete, it wouldn't be as durable in the long run.
Mix a darker color of gray for the steps -- use a 1/2" drill with a mixing paddle.
Poor a bag of cementious dye into the bucket of water, and mix it.
To create a red brick effect, go over the stenciled area with a light coat of red. Have someone protect the unpainted areas by holding cardboard over those areas. The stencil is held down by 2x4s. Let it set for a few hours before pulling off the tape. The material should be dry before pulling the tape.