Colored pencil is very hard to remove once it is on paper. It is easier to remove lighter colors than darker colors. Here are a few tips on removing colored pencil and accidents or spills from the surface of your paper. A word of caution: whatever tip you attempt to use, please remember to be careful with the surface of the paper and test any advice or tip before applying it to your art project.
• I just tried this tip to remove cat footprint marks off one of my recent drawings. Get some q-tips and bleach and apply lightly to the surface of the paper to remove marks or stains. It lifts the color up immediately but be careful as to not tear the paper. Use this tip only on white paper and allow the area to dry before applying any colored pencil to the surface of the paper.
• Remove colored pencil with artist's tape or scotch tape. Tear off a piece of tape and gently press down the tape into the area you wish to remove color. I use my finger in a circular motion and rub the area, then gently remove the tape. Be careful when lifting so as you do not tear the paper.
• Remove colored pencil with a Sakura Cordless Electric Eraser, a Staedtler Mars Plastic Erasers, a Factis Soft Oval Eraser, a Pentel Clic Retractable Eraser or a Sanford Design Kneaded Rubber Art Eraser.
• Lightly apply adhesive remover, like Un-du (https://un-du.com/), with q-tip to lift the color off.
• Apply Bostik Blu Tack Re-usable Adhesive or Loctite Fun-Tak Mounting Putty a reusable removable blue adhesive putty. Carefully apply adhesive to the surface of your paper and remove the color from your paper.
• Apply Badger Gloss Foto/Frisket Film to the colored area and carefully remove the color off of the surface of the paper.
• Here's a tip from Denise Leitch - My husband taught me a good way to remove the color from your paper but it has to be done with a very delicate hand. Take an X-Acto knife and very carefully scratch off the color you wish to remove. Do not use the tip of the blade, use it flat, like you're shaving and use short light strokes. It takes time, and again a light touch. If done correctly, you can remove just the color without tearing the paper. You won't get every bit of color off, but you can remove enough of the color to reapply the correct color.
Keep on Creating!