Watercolour errors--No worries--Fix 'em

The Painting Opportunity knocks again did not suit the huge dark shadow over the bottom 2/3rds of the canvas. I've heard from other artists that you can place it in a bath tub and wash off everything you want down to the paper...so that is just what I did. It works! I used a Mister Clean Magic Eraser (original) and with about 2 inches of water in the tub, simply and gently rubbed it down to the paper. Here is a picture after the water bath. I will leave it to dry flat in the tub and once completely dry, I will start painting on that section again...no shadow this time :)