A little while ago, I received these two Rubberset brushes from @Enrico and I finally got around to working on them. First pic showing their original conditions.......... I got real lucky as I was able to pull both knots off by clamping them near the base real tight with a pair of vice grips and twisting them off. This second pic after removing the original paint, some filling in with modeling putty and sanding.......... This third pic after priming, painting these colors and a few clear coats.......... And this fourth pic with knots installed from my inventory. I decided on these before working on them because they fit without any enlarging of the holes. A badger on the left, and a synthetic on the right..........