when you have been working hard on a piece of art only upon completion you end up destroying your art worksome of the artists may leave the canvas alone and decide to start the painting afresh others may be inspired to move on amidst the mistake and there those who can turn the mistake into something artistic.
A watercolor mistake can be rectified using water spray.The idea of using the water spray may sound insane, but it works you can do it and protect the rest of the painting using masking tape.
When painting is overdone in an area the only thing you can do to correct the mistake is using the pestle this helps to cover the area that was covered too much into a light space.
Being an artist and having an art block is very normal the only thing that makes a unique artist is how you overcome the art block.
Taking the block positively is the best way to overcome it by doing this you can be able to come up with new ideas .
If you are a professional artist the good thing to do first is to go to the local art community center by doing this you will have the ability to see what others are doing and come up with ideas
You can call your friends to an event, or you can park an event with your friends through this you can be able to overcome the art block by sketching what you find interesting on the way.
The other thing is calling a fellow artist to your studio and let the artiste critique you hence he can help you improve first and then during the improvement you might find some inspiration that may lead you to paint new canvases.
Art exhibitions are also places where artist go to get there block removed this is easily done by seeing what other artists are drawing and being inspired by this helps you get into the mood of drawing you can also talk to the artist and he can give you new ideas.
Sometimes artist block may be due to boredom or just seeing the canvas for long you can just have a break and have a distraction like going swimming or playing football after some time you will be able to overcome the block.