Patch any holes or uneven areas of the wall with spackling compound and a putty knife. Allow the compound to dry before sanding the patched areas. Sand until the surface is completely smooth. Dragging works best on a smooth, flawless surface.
Tape around the outside of the wall or painting surface with low-tack painter's tape. Prime along the edges of the tape with latex primer and the angled paintbrush. Prime the rest of the wall, using the paint roller.
Apply the paint for the background of your strie in one or more smooth coats of paint. Use a latex paint in a satin finish for less friction while dragging the brush.
Mix a glaze consisting of water-based glazing medium and tint or acrylic paint. Test the color by painting a sample on the wall and wiping it off with a damp rag.
Begin the strie process on the left edge of the wall. Use a small foam roller to apply a strip of glaze approximately 6 inches wide. Lock your wrist while dragging the brush through the wet glaze vertically. Drag your brush over the same area more than once to soften or correct lines. Wipe your brush off after each pass.
Apply another strip of glaze to the right of the last strip. Drag this next area, overlapping the last striped part by about ¼ inch. Repeat the process until the entire wall or surface has been dragged.