Paint by Numbers Mistakes to Avoid

The mistake: Loading the brush heavily and applying a thick coat in one pass. This creates raised texture, visible brushstrokes, and can obscure nearby canvas numbers you haven't reached yet.

The fix: Use a lightly loaded brush and thin the paint slightly with a drop or two of water until it flows smoothly. Apply two thin coats rather than one thick one, allowing the first to dry before adding the second. The result is richer, more even colour.

The mistake: Starting straight out of the packaging when the canvas has been tightly rolled for shipping. A curved canvas makes it difficult to stay in lines and sections keep lifting off the table.

The fix: Unroll the canvas and place heavy books on the corners for 30 minutes to an hour before beginning. Alternatively, lightly mist the back of the canvas with water and press it flat. Working on a flat surface makes the whole experience significantly easier.

The mistake: A quick dip in water between colours leaves residual paint on the brush. This muddies the next colour and creates unexpected mixed tones across the canvas.

The fix: Rinse the brush thoroughly in clean water, wipe firmly on a paper towel, and inspect the bristles for any residual tinge before dipping into a new pot. Change your rinse water frequently — murky water recontaminates even a rinsed brush.

The mistake: Working under warm indoor lighting which distorts colour perception. Blues and greens look similar, pale yellows disappear against white canvas, and canvas numbers become very hard to read.

The fix: Use natural daylight whenever possible, or a daylight-balanced LED lamp. This single change dramatically improves colour accuracy and makes the small canvas numbers far easier to read, reducing errors significantly.

The mistake: Assuming one coat is enough. Often the canvas texture or print beneath shows through a single thin application, leaving sections looking patchy or faded.

The fix: Once the first coat dries (5–15 minutes), apply a second coat to all sections needing it. This is especially important for light colours (white, pale yellow, light pink) and areas where you can still see the canvas through the paint.

The mistake: Painting detailed foreground elements first and leaving large background areas until the end. This risks accidentally dragging a hand or sleeve across completed detailed sections while reaching across the canvas to paint background areas.

The fix: Always start with the background. Large, forgiving background sections are ideal for warming up your technique, and completing them first means all subsequent detailed work is done on a clean, dry canvas.

The mistake: Not sealing pots tightly after a painting session. Acrylic paint skins over quickly in air exposure, and a partially dried pot loses workability and produces uneven coverage.

The fix: Press every lid firmly closed after use — a satisfying click means it's sealed. If a pot develops a dried skin on top, pick off the skin with a toothpick, add a single drop of water, and replace the lid for 10 minutes before using.

The mistake: Painting two neighbouring sections before the first has dried. The wet edges of each section bleed into the other, creating blurry, mixed-colour borders that are difficult to correct.

The fix: Wait for one section to dry (touch lightly — no transfer means it's dry) before painting directly adjacent areas. Alternatively, paint every other section in a row and come back to fill the gaps once the first pass is dry.

The mistake: Skipping varnish and hanging the painting unsealed. Over time, dust settles into the paint texture, colours can fade from UV exposure, and moisture can cause the canvas to warp or the paint to lift.

The fix: Apply a thin coat of clear acrylic varnish once the painting is fully dry (wait at least 24 hours). Use a wide soft brush and long, even strokes. Satin finish is the most versatile — it protects without making the painting look overly glossy or plastic.