Once the pencil is trapped under a layer of dry watercolour paint it is effectively sealed in and you will not be able to erase it. This is easy to do (and quite fun) with a kneaded eraser. Simply dab repeatedly at your sketch with the kneaded eraser.
You Won't Risk Damaging the Painting With the Eraser
Erasing the pencil lines from a watercolor painting is another opportunity to damage the painting. For one, you can damage the paper if you erase too aggressively. Watercolor paper is tough, but it can only handle so much erasing.
Watercolor painting has a reputation for being unforgiving, but there are several different ways to fix mistakes in watercolor, make changes, or even to incorporate mistakes into your painting if you can accept some as "happy accidents." You can blot paint up while it is still damp, lift out paint once it has dried, ...
The thing to remember is it works best if you paint acrylic over watercolor paint since after mixing watercolor with acrylic paint they are thicker and become waterproof after they dry, which means your watercolor paint won't stick.
Here are three ways to do this:
- Damp method: Lightly dampen the area carefully with a damp brush. ...
- Wet method: Wet the area thoroughly, using a wet brush. ...
- Flooding method: Larger areas (e.g. skies) can be put under a slow-running cold tap.
Since it's kneadable, you can roll it up into a tiny point to remove small areas or pencil marks. It's also gentle on the paper.
One way is to minimize the pencil lines after you have your picture drawn. I use a kneaded eraser to gently roll or pat over the lines. That picks up the excess graphite, but still leaves enough of a line for you to follow. These will be covered by most colors as you apply your paint.
If you are planning to use the acrylics in a thinned, watery way, then there is indeed a good chance that those misplaced charcoal and pencil lines will show through the paint. The best thing I can suggest is to carefully paint over those charcoal and pencil mistakes with white gesso.
If you are trying to remove lightly applied graphite from the surface of an acrylic painting, you might try gently washing with a mild soap (like baby shampoo) and water… using a cotton swab…then rinse well.
As previously mentioned, watercolor painting definitely requires some plan work. When creating your initial sketch, make sure to map out/indicate where the lightest and darkest areas of your painting will be. You can see how I did this in the PDF included at the end of this post.
There are actually some alternatives to erasers that will help you remove pencil marks completely. They work as same as the actual pencil erasers. For example – soft bread, hot glue, clay, correction fluid, rubber bands, and adhesive putty.
Molecules Make the Mark
Each tiny piece of pencil lead is made up of many molecules of graphite. Graphite molecules are flat groups of carbon atoms that are stacked in layers. The layers slide against each other and allow the lead to slide off the pencil point and onto the paper.
Fortunately, you can clean dirt and dust from your paintings with minimal risk of damage. The best way to clean oil, acrylic, and watercolor paintings is to brush away dirt and dust with a soft-bristle paint brush. For stubborn dirt on oil or acrylic paintings, you can use saliva as a paint-friendly cleaning solvent.
Dab or gently rub the painting with the pieces of bread. The soft, doughy texture of the bread picks up the dust and dirt on the painting without harming the watercolor. Wipe the painting with a piece of bread. As the bread becomes dirty, replace it with a fresh piece.
To avoid getting a watercolor bloom, you need to ensure your brush is less wet than the paper area you will be applying the next batch of color on. You may find you need to work just a little bit faster as well. That is the problem a lot of the times with watercolor beginners.
Watercolours look bad when they are too opaque. So, strive to achieve the opposite, which are light and transparent layers. Watercolours look dull when they lack vibrancy. So, make sure you're regularly rinsing off your brush and mixing colours whose pigments compliment each other.
One of the most common problems that can result in dull watercolor paintings is muddying. Muddying is caused when two or more paints mix together instead of forming layers. Muddying can cause your radiant yellows to turn into a dull orange.