24. Once the final detail repairs were complete, we sprayed on a second coat of primer/sealer. This blended and filled the detail repairs as well as the 220-grit surface left in the epoxy primer coat by the blocking process. The second primer layer will be sanded to a much finer 600-grit surface for the basecoat and clearcoat. We used Valspars Supa Seal polyurethane primer/sealer. After it cures, the epoxy leaves a much more stable surface than softer primer surfacers. We tinted it with some basecoat color to turn it from light gray to a reddish pink to improve coverage of the basecoat stage.