Plywood Furniture Finish Guide: Oil vs Polyurethane

Finishing Your Plywood Projects

Applying the right finish protect the plywood veneer from stains while enhancing the wood grain. Because plywood edges contain cross-sections of open wood pores, finishing plywood requires a slightly different approach than finishing solid wood.

Best Finishes for Plywood

1. Water-Based Polyurethane: The best overall finish for desktops and tabletops. It dries clear (does not yellow Birch), provides excellent scratch resistance, and dries in 2 hours.
2. Rub-On Hardwax Oils (e.g., Rubio Monocoat, Osmo): Perfect for a natural wood feel. It bonds molecularly to the wood fibers in one coat, highlighting the grain without creating a thick plastic layer on top.
3. Wiping Varnishes (Gel Stain / Arm-R-Seal): Offers deep warmth and ambering, best for plywood with Walnut or Cherry face veneers.

Pro Edge finishing Trick

Plywood edges absorb liquid finish like a sponge. Before applying your topcoat, seal the edges with a washcoat of shellac or a 50/50 mix of wood glue and water. Sand this sealer flat with 220-grit paper. This blocks the open grain pores, ensuring your final topcoat applies smoothly without soaking in unevenly.