When refining on the shoulder margin though, be careful not to get rid of the rounded internal line angle and make it acute. So only apply the hand instrument to the outer side of the shoulder. You may use an end cutting bur, but do not focus it on using on that irregular portion only because you may end up gouging that area instead. Do glide the bur in large strokes, in wide sections.
Feel with your finger if there are any sharp edges along the incisal area. If there are any, you may smoothen this out with a hand instrument.
Upper Canine Crown Preparation Hand Instrumentation and Refinement