1) The car needed multiple undercoats before the final coat of paint could be applied.

2) The artist used a white undercoat to help the colors pop in the painting.

3) Applying undercoats can help protect metal surfaces from rusting.

4) The undercoats of primer helped smooth out the surface before painting.

5) A good undercoat can improve the adhesion of the topcoat to the surface.

6) The undercoats of varnish added depth and richness to the wood.

7) The painter made sure to apply even layers of undercoat for a smooth finish.

8) Undercoats are essential for achieving a professional paint job.

9) The undercoat dried quickly, allowing for a swift application of the final coat.

10) Using a quality undercoat can extend the lifespan of the paint job.