We were painting a lantern, when someone spilled dark paint over a yellow part.
The process for creating is the following:
You stretch the cloth over a wooden frame. (ca 2.5m x 2.5m/ 8foot by 8 foot) The cloth is then coated in multiple layers of gelatin. The gelatin tightens the cloth, and hardens it a bit, so you can paint on it.
The problem is, that it is lit from the back, so you can't overpaint it.
We were drawing with watercolor.
We can put a bit of water on it, however, too much will remove the gelatin, which makes us unable to paint there. Rubbing too much will remove the gelatin as well.
Is there a way to remove some color, by not destroying the rest?
How would the restoration process look like, when the painting was old? Maybe I could adapt this?