Do You Need to Prepare Your Canvas with Gesso Before Starting a Paint by Numbers Project?
Introduction
Starting a new paint by numbers project is exciting. You open the box, unroll the canvas, and begin imagining the finished artwork hanging on your wall. But one question that often comes up—especially for beginners—is: Do you need to prepare your canvas with gesso before you start painting?
The short answer is no—most paint by numbers canvases are ready to use right out of the box. However, there are a few situations where using gesso can improve your painting experience.
What Is Gesso, and What Does It Do?
Gesso is a primer used to prepare surfaces for painting. It creates a slightly textured surface that helps paint stick better and spread more evenly.
Traditional artists use gesso when working with raw canvas, wood panels, or other porous surfaces. In paint by numbers kits, the canvas is usually pre-primed, meaning it already has a base coating applied during manufacturing.
Most Paint by Numbers Canvases Are Already Pre-Primed
Modern paint by numbers kits—especially higher-quality ones—are designed to be easy to use straight out of the box. A typical pre-primed canvas will have a smooth but slightly textured surface, hold paint without absorbing it too quickly, and allow paint to spread evenly.
When You Do NOT Need Gesso
You likely do not need gesso if:
• The canvas feels smooth with light texture
• Paint spreads easily across the surface
• The paint does not soak into the fabric
• Numbers remain clearly visible
• Your kit is from a reputable brand
• You are working on a standard beginner or intermediate kit
When Applying Gesso Can Improve Results
You may want to use gesso if your canvas feels rough or overly textured, absorbs paint too quickly, causes paint to appear streaky or thin, or requires multiple coats to hide numbers.
Benefits of Using Gesso
Gesso helps create a smoother surface, improves paint coverage, enhances color vibrancy, and can reduce the visibility of numbers showing through lighter paint colors.
How to Apply Gesso (Step-by-Step)
- Choose clear gesso when possible.
- Apply a very thin layer using a flat brush or sponge.
- Let the canvas dry for 12–24 hours.
- Optionally sand lightly with 400–600 grit sandpaper for extra smoothness.
Common Mistakes to Avoid
Avoid using thick layers of gesso, painting before the surface is fully dry, or skipping sanding when the canvas remains rough.
Alternative to Gesso
Many painters prefer using a white acrylic paint pen to lightly trace over numbers in light-colored areas. This helps prevent numbers from showing through and improves overall coverage.
Final Thoughts
For most paint by numbers projects, gesso is optional—not required. Modern canvases are designed to be beginner-friendly and ready to paint immediately. Use gesso only if your canvas feels rough or paint coverage looks weak.
Quick Summary
- Most paint by numbers canvases are pre-primed and ready to use
- Gesso is optional, not required
- Use clear gesso if your canvas feels rough
- Apply thin layers only
- A white paint pen can help hide numbers
- Test a small area if unsure