A brush comprising: a tuft holder ; a primary operation axis ; a first row of tufts that: is substantially parallel to the primary operation axis; and, comprises at least first and second tufts; a second row of tufts that: is substantially parallel to the primary operation axis; and, comprises at least first and second tufts; wherein the first tuft in the first row: extends from the tuft holder; and, is angled at a first tuft angle within a first plane that is parallel to the primary operation axis with respect to a second plane that is perpendicular to the first plane and parallel to the primary operation axis; wherein the first tuft angle is a forward acute angle that is between 60 degrees and 87 degrees, inclusively; wherein the second tuft in the first row: extends from the tuft holder; and, is angled at a second tuft angle within the first plane with respect to the second plane; wherein the second tuft angle is a forward acute angle that is between 60 degrees and 87 degrees, inclusively; wherein the first tuft in the second row: extends from the tuft holder; and, is angled at an third tuft angle within the first plane with respect to the second plane; wherein the third tuft angle is a backward acute angle that is between 60 degrees and 87 degrees, inclusively; wherein the second tuft in the second row: extends from the tuft holder; and, is angled at a fourth tuft angle within the first plane with respect to the second plane; wherein the fourth tuft angle is a backward acute angle that is between 60 degrees and 87 degrees, inclusively; and, wherein the first and second tufts in the first row and the first and second tufts in the second row are formed of stainless steel. a tuft holder ; a primary operation axis ; a first row of tufts that: is substantially parallel to the primary operation axis; and, comprises at least first and second tufts; a second row of tufts that: is substantially parallel to the primary operation axis; and, comprises at least first and second tufts; wherein the first tuft in the first row: extends from the tuft holder; and, is angled at a first tuft angle within a first plane that is parallel to the primary operation axis with respect to a second plane that is perpendicular to the first plane and parallel to the primary operation axis; wherein the first tuft angle is a forward acute angle that is between 60 degrees and 87 degrees, inclusively; wherein the second tuft in the first row: extends from the tuft holder; and, is angled at a second tuft angle within the first plane with respect to the second plane; wherein the second tuft angle is a forward acute angle that is between 60 degrees and 87 degrees, inclusively; wherein the first tuft in the second row: extends from the tuft holder; and, is angled at an third tuft angle within the first plane with respect to the second plane; wherein the third tuft angle is a backward acute angle that is between 60 degrees and 87 degrees, inclusively; wherein the second tuft in the second row: extends from the tuft holder; and, is angled at a fourth tuft angle within the first plane with respect to the second plane; wherein the fourth tuft angle is a backward acute angle that is between 60 degrees and 87 degrees, inclusively; and, wherein the first and second tufts in the first row and the first and second tufts in the second row are formed of stainless steel. <EOS>