The idea is to leave no residue. So forget about oil, green ink, floral clay, pins and wires. Not Disbudded . Single stem blooms must be exhibited without sidebuds. Failure to remove sidebuds is grounds for disqualification.
Sloppy removal requires penalization.
Remove any sidebuds or sidebud residue when cleaning the rose. The determination of the existence of form is initially made by looking straight down into the bloom. The petals of a rose with exhibition form will be seen to unfurl in a perfect spiral from a point in the center. Roses showing more than one point in the center are said to have split centers. Roses with no clearly defined center point are often referred to as having muddled centers.