Apply Glazing Putty to Imperfections

What happens here

If, after the initial sanding and a first coat of paint (which is implied to have been applied off-camera before this step, as the presenter notes 'still seeing ridge lines'), there are still slight ridge lines or minor imperfections, Bondo Glazing & Spot Putty can be used. Apply a thin coat of the putty directly over these subtle imperfections using a spackle knife. Smooth it out evenly, covering only the necessary areas. Allow the putty to dry completely, which typically takes about an hour.