Sanding your Wood Canvas

Every beautiful woodburning begins with something surprisingly simple—a buttery smooth wood canvas.

Even if the wood you purchase has already been sanded, it may not be smooth enough for woodburning. A finely sanded surface allows your hot wire tip to glide effortlessly across the wood, giving you greater control while reducing unnecessary wear on your tip.

If you’re still choosing a wood canvas, I invite you to read my blog on selecting wood for woodburning. I explain the difference between softwoods and hardwoods, and why softer hardwoods are often a woodburner’s best friend.

Why sanding matters

The time you spend sanding is an investment in every burn that follows.

A smooth surface allows your wire tip to glide freely without catching on uneven grain, resulting in cleaner lines, smoother shading, and a more enjoyable woodburning experience. As an added bonus, it also helps extend the life of your wire tips.

Preparing live-edge wood

Before sanding my live-edge wood canvases, I apply a thin coat of Mod Podge Hard Coat to the bark using a soft, round watercolour brush. The Mod Podge acts as a sealant, helping to prevent the bark from flaking over time. I allow it to dry for 24 hours before sanding both the front and back of the wood.

My sanding setup

I use a portable workbench with adjustable swivel pegs to hold my wood securely while sanding. If you don’t have a workbench, placing the wood on a rubber mat works surprisingly well to keep it from sliding.

For safety, I wear safety goggles and a 3M 8511 N95 respirator while sanding. To keep my goggles from fogging, I apply a small amount of anti-fog solution before I begin.

Since sanding creates plenty of dust, I prefer to work outdoors. Although my sander has a dust canister, there’s always a little cleanup afterward.

I use a square orbital (quarter-sheet) sander because it easily reaches corners and edges. I simply cut standard sandpaper sheets into four pieces before getting started. While you might prefer a round random orbital sander, I enjoy the versatility of the square pad, and replacement sandpaper is easy to find at most hardware stores.

Whenever possible, I sand with the grain to minimize visible sanding marks.

My sanding sequence

When I first started woodburning, I sanded my wood canvases with 320-grit sandpaper. Then I tried 600-grit, and I was amazed by the difference; the surface became incredibly smooth, allowing my wire tip to glide almost effortlessly across the wood. I never looked back. If I plan to woodburn the sides or the back of my canvas, I sand those progressively to 600 grit as well.

My typical sanding sequence is:

• 120 grit

• 220 grit

• 320 grit

• 600 grit

Cleaning the surface

Once sanding is complete, I wipe away the dust with a soft, dry cloth. I avoid using a damp cloth because moisture raises the wood fibres, making the surface rougher again—undoing some of the work I just completed.

Material

• Square orbital sander with dust canister

• Sandpaper (120, 220, 320, and 600 grit)

• Portable workbench with adjustable swivel pegs

• Mod Podge Hard Coat

• Soft, round watercolour brush

• Soft, dry cloth

Is your wood canvas buttery smooth? If not, sand away—and let your wire tip do the gliding.