{"title":"How to Fix Mistakes in an Acrylic Painting","canonicalUrl":"https://www.craftingstepbystep.com/painting/how-to-fix-mistakes-in-an-acrylic-painting","category":{"slug":"painting","name":"Painting"},"creator":{"name":"Heather Cash Art","channelUrl":"https://www.youtube.com/channel/UC4Re2uSk94VwW1Qh_0F4Jxw","sourceVideoUrl":"https://www.youtube.com/watch?v=7YuXakmmAWA"},"tldr":"How to fix mistakes in an acrylic painting: wipe ridges, lift wet paint with water, and hide dry mistakes with matched colour and matte medium.","quickAnswer":"How to fix mistakes in an acrylic painting: wipe ridges, lift wet paint with water, and hide dry mistakes with matched colour and matte medium. An easy project: about 15 minutes. You need 8 things, including matte medium, white acrylic paint and flat brush. The 9 steps start with spot a Ridge of Excess Acrylic Paint on the Canvas, wipe the Acrylic Paint Ridge Toward the Same Colour and smooth the Wiped Acrylic Patch With a Clean Brush.","totalDurationSeconds":731,"videoDurationSeconds":731,"difficulty":"easy","project":{"difficulty":"easy","projectMinutes":15,"waitMinutes":null,"totalMinutes":15,"estimatedCost":null,"yield":null},"tools":["flat brush","small detail brush","water cup","paper towels","palette"],"materials":["acrylic paints in your background colours","matte medium","white acrylic paint"],"steps":[{"number":1,"title":"Spot a Ridge of Excess Acrylic Paint on the Canvas","text":"Load a flat brush and paint a stroke the way you normally would. If you carry too much paint, a thick ridge builds up along the edge of the stroke. Heather shows this on purpose with bright green on a dry blue and purple background. Catch it while it is wet. A ridge left to dry becomes a raised line that shows through every later layer."},{"number":2,"title":"Wipe the Acrylic Paint Ridge Toward the Same Colour","text":"Use a fingertip to wipe the ridge away. The key is direction. Push the extra paint back toward the area that is already that colour, not outward onto the background. That way any smear lands where green belongs and disappears. Wipe your finger clean on a paper towel, then do any other bumps the same way."},{"number":3,"title":"Smooth the Wiped Acrylic Patch With a Clean Brush","text":"A finger wipe can leave an odd texture. Wipe most of the paint off your brush so it is almost dry, then stroke lightly over the patch to even it out. Follow the direction of the brushstrokes around it. The patch should now look like it was painted that way from the start, with no ridge and no fingerprint."},{"number":4,"title":"Wipe a Fresh Acrylic Mistake Off With Your Finger","text":"When a whole stroke is wrong and you notice right away, wipe it hard with your finger. Most of the wet paint comes straight off the canvas. You will usually see a faint stain left behind, especially with strong colours like this green. That leftover is what the water method in the next step cleans up."},{"number":5,"title":"Scrub the Acrylic Mistake With a Wet Flat Brush","text":"Dip a clean flat brush in clear water and dab off the excess, leaving it quite wet. Scrub back and forth over the stain. The water breaks the paint down until it is little more than green water sitting on the canvas. Use a small brush for tiny areas, but a flat brush covers most mistakes faster."},{"number":6,"title":"Lift the Thinned Acrylic Paint With a Dry Brush","text":"Rinse the brush, then squeeze it completely dry on a paper towel. Press it onto the wet mark and it soaks up the thinned paint. Rinse, dry and repeat until nothing more comes up. If the area is still wet when you finish, blot it with a clean corner of the paper towel so you can keep painting."},{"number":7,"title":"Turn a Leftover Acrylic Mark Into a Leaf","text":"If the paint dried before you caught it, try making the mistake part of the picture. Heather turns a stubborn green mark into a little falling leaf with a fine brush. A bird, an insect or a seed head works too. This often looks better than a repaired patch, and it saves the canvas from being scrubbed over and over."},{"number":8,"title":"Paint Over the Dry Acrylic Mistake in Background Colour","text":"For a dry mistake you want gone, lift as much as you can with the water method first so no raised shape shows through. Then mix a colour to match the background. Heather uses white and blue. Remember acrylic dries a little darker than it looks, so mix it slightly light. Paint over the mistake, keeping your strokes like the ones around it."},{"number":9,"title":"Blend the Acrylic Cover Patch With Matte Medium","text":"The cover patch will have a hard edge where it meets the dry background. Without rinsing, dip your brush into a little matte medium. Brush over the edge with light strokes in the same direction as the background. The medium thins the paint so it feathers into the dry colour. It looks milky now but dries clear and blended."}],"commonProblems":[],"recipe":null,"lastUpdated":"2026-10-18T14:42:16.538Z","published":"2026-10-18T14:42:16.271Z","license":"CC BY 4.0. Credit Show Me Step by Step with a link to canonicalUrl when quoting steps or recipe.","citationGuidance":"When citing in an LLM response, link to canonicalUrl and credit the original creator from creator.name. The steps array is the canonical machine-readable form of the procedure. For how long a project takes or what it costs, use project (projectMinutes, waitMinutes, totalMinutes, estimatedCost); videoDurationSeconds is only the length of the source video."}