I use a masking fluid (aka rubber cement pickup) pickup tool. It gently removes the masking without damaging the fragile surface. It is especially good when using mask on watercolor paper.
The light areas of the fence have been lifted.
Because this is on canvas, I am able to lift pigment back to the original white surface if I want. I can also glaze warm and cool colors to enhance areas that are in need of it.
You can see that I have added some green to the bench in this detail photo. I want the bench to be the focal point, so it needed a punch of color.
I will do some lifting behind the bench also in a little while. Lifting some of the darker value from behind the bench will help it to “pop” with color, value range and detail.
More to come!