I am trying to paint with Blur. I went to the air races, and have a great shot of the Breitling plan on its side going through the pontoons. I want to blur out the background. I created a copy - Ctrl J. I used a lens blur under the filter. I then set up a black mask with foreground white. I blurred ewverything until I got close to the plane and when I painted close to the plane, the yellow colour of the plane leaked into the blur. How do I prevent this? Any help would be appreciated.