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Painting Over Varnished Stained Wood

Most paints are designed to penetrate into a surface. Unfortunately, a good varnish performs as a sealant that prevents fluids from penetrating to the stained wood beneath. That's why painting over a varnished surface will require more effort and a few more steps than painting over unfinished or previously painted wood. Fortunately, you won't need to strip off the existing stain and varnish, because there are special-purpose primers and paints specifically formulated to adhere to the most challenging substrates.

Things You'll Need

  • #000 steel wool
  • TSP or TSP substitute
  • 2 sponges
  • Water-based bonding primer
  • Synthetic filament brush
  • Acrylic latex paint
  • Foam mini-roller
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Instructions

  1. How to Paint Over Varnished Stained Wood

    • 1

      Rough-up the old varnish with a #000 steel wool, being careful to work the steel wool into any curves or crevices. Do not work the steel wool too vigorously; it's not necessary remove the varnish--you simply need to remove its shine.

    • 2

      Sponge down the entire surface with TSP or a TSP substitute to thoroughly clean off the steel wool residue and open up the pores of the varnish. Wipe the TSP off using a clean, wet sponge. Make sure the surface is completely dry and dust-free before moving on to the next step.

    • 3

      Apply a water-based bonding primer using a synthetic bristle brush. Look for a primer that highlights its bonding quality in the product's name or promotes bonding as a primary feature on its label. Allow two hours for drying. If the primer appears uneven after it has dried, apply a second coat.

    • 4

      Apply two coats of acrylic latex paint using a high quality synthetic fiber brush or a foam mini-roller. An acrylic latex paint will adhere better than a conventional latex and form a hard, water-resistant finish that should last for many years.