Custom Paint by Numbers: Tips and Tricks

Once you know the basic process, a handful of small tricks separate a canvas that looks tidy from one that looks genuinely finished. These are the paint by numbers tips and tricks we’ve gathered from years at the easel — how to flatten a stubborn canvas, keep your paints alive, fix the inevitable slip, blend an edge, and give your piece a clean, professional finish.

Flatten a wrinkled canvas first

Kits ship rolled, so almost every canvas starts with a curl or a few creases. Painting on a wrinkled surface is a fight you don’t need, so flatten it before you begin. There are two reliable methods:

The iron method

Lay the canvas face-down on a clean towel. Mist the back lightly with water — a fine spray, never soaking — then iron on medium heat with slow, steady passes. Keep the iron moving so it never lingers, and stop the moment the wrinkles relax. This is the fastest fix for deep creases.

The stretch-and-roll method

Prefer no heat? Gently roll the canvas backward, against the direction of its original curl, and hold it under a stack of heavy books overnight. It’s slower but foolproof, and there’s zero risk to the printed outline.

Keep your paints fresh

Acrylic’s greatest strength — it dries fast — is also the thing that wastes the most paint. A few habits keep every pot usable to the last drop:

• Close paint lids promptly. Only open the pot you’re painting from, and press its lid shut the moment you switch colours. Pots left open dry out in minutes.
• Revive a slightly dry pot. If a colour has started to thicken, stir in a single drop of water and mix well. That’s usually all it takes to bring it back to a smooth, paintable consistency — add water sparingly so you don’t dilute the colour.
• Run low? We’ve got you. Our free paint and brush for life promise means a replacement pot is always a message away, so a nearly-empty colour never stops your project.

Clean technique and a good setup

Most “professional-looking” results come from ordinary discipline, repeated. Keep these in mind every session:

• Work in good light. Bright, even light keeps the numbers readable and the colours true. Daylight or a warm angled lamp both work well.
• Protect your surface. Newspaper, an old towel or a plastic sheet under the canvas — acrylic is permanent once dry.
• Start with simpler designs. If you’re new, build confidence on a bolder, lower-detail canvas before tackling a busy portrait.
• Match numbers methodically. Complete every region of one colour before moving to the next. It’s faster and keeps your brush clean.
• Work top-to-bottom, smallest areas first. Starting from a top corner keeps your hand off wet paint; doing the fiddliest little regions first, while you’re fresh and focused, gets the hard part out of the way.
• Let areas dry before the next colour. This is the big one — painting a wet region right beside another causes the two colours to bleed. Patience here prevents muddy edges.
• Rinse brushes between colours and dry them on a cloth, so you never carry one colour into the next pot or water it down.
• Use a magnifying glass for detail. For the tiniest numbered regions, a magnifier turns squinting frustration into an easy, steady stroke.
• Practise strokes on scrap paper. A few test strokes settle your hand and let you dab off an overloaded brush before it touches the canvas.

Fixing mistakes

Nothing on a numbered canvas is permanent, so relax — almost every slip has an easy fix.

• Painted outside the lines? Let the mistake dry fully, then simply paint the correct colour back over it. Acrylic covers acrylic completely, and once dry the error vanishes. The only wrong move is trying to fix it while it’s still wet.
• Number showing through? Totally normal on lighter colours. Let the first coat dry, then add a second thin coat to hide it.
• Brush lines visible? Use a slightly damp brush with lighter pressure, and even it out with a second thin coat.
• Wrong colour in a region? Same fix — dry it, then repaint with the right number. No need to start over.

Advanced touches: blending and sealing

Once the basics feel natural, a couple of finishing techniques lift a canvas to the next level:

Blending edges

Paint by numbers gives you flat blocks of colour, but you can soften the borders where two shades meet — especially useful for skies and skin. While both colours are still slightly wet, take a clean, barely-damp brush and lightly feather back and forth across the seam. Work gently and don’t overdo it; a light touch turns a hard boundary into a smooth gradient.

Sealing choices

When your canvas is completely dry, a coat of clear varnish protects the paint and unifies the finish. You have a choice of look: matte for a soft, understated gallery feel, or gloss for richer, more vivid colour. Apply it in thin, even strokes and let it cure fully before framing. This last step is what makes a finished piece feel truly done — ready to hang and enjoy. Not sure what size frame you’ll need? Our size guide lays out every canvas dimension.