How To Paint Over Polyurethane

By Robert Robillard on How To

 How To Paint Over Polyurethane Or Varnish Finishes

Etching And De-Glossing the Surface:

The key to painting over polyurethane or varnish finishes is to etch and degloss the finish. The key is in creating a perfect bonding environment.

Etching and De-glossing the poly or varnish finish ensures that the new paint finish goes on smoothly, bonds tightly and lasts longer.

1. Sand all surfaces lightly too etch the finish. Use the sanding sponge on contours and details on woodwork like door panel molding or baseboard trim caps.

2. You know you have etched the surface when you can see light scratches in the old finish. This is an important step and a common mistake. Take your time to sand everything lightly

3. Sand all at once: sand everything that you will be priming.

Tip: Use soft sanding blocks to sand detailed molding or profiles in your woodwork. [Example: door panels, baseboard trip caps.]

4. Vacuum all sanding dust.

5. Wipe down all of the woodwork with a clean, damp rag or sponge.

6. Apply Wil-Bond Liquid Surface Preparation to the poly or varnished wood. There are other brands out there but experience has shown me that this brand works best!

7. Follow the Wil-Bond directions on the can. Below is a summary of these directions:


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About the author

Robert Robillard

Carpenter / Remodeler / Editor

Rob Robillard is “The Concord Carpenter” Rob is a builder, general contractor, carpenter, woodworker, and editor of Concord Carpenter and ToolBoxBuzz As a General Contractor and carpenter, Rob owns and operates Concord Carpenter LLC. A full-service remodeling and construction company. Rob is a recognized leader in home building best practices and a source for how-to information for building professionals. On this website, Rob covers all aspects of home construction, building science, home improvement, woodworking, remodeling, and some of the best product and tool reviews. Rob is in charge of our Tool and Product Review series - Concord Carpenter Videos where we post all of our tool reviews and video tutorials. Rob approaches remodeling and building construction with a pragmatic and problem-solving approach. He enjoys using his knowledge and experience to help and educate building professionals as well as DIYers on best practices in the construction and remodeling industry. He's a strong advocate for "raising the bar" in the construction trades and promoting the trades to youth. #BeAMentor #Green2Great Craftsmanship, quality, and pride guide his journey on this channel The Concord Carpenter's motto: "Well done is better than well said!" : Read more about Rob

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