Kenny - Those hard round bumps are scale insects with protective coatings. A solution of 5 parts water, 1 part alcohol and a squirt of liquid dish soap will dissolve and eliminate them. The problem is that the juvenile scales are translucent and nearly invisible so if you treat only the ones you see, the juveniles will survive, reproduce and the infestation will return.
To be successful, you will have to spray all leaf and stems surfaces until they are dripping wet. It is a very messy task, but the only way to achieve success, regardless of what you use as a spray, including neem oil.
You may be advised to wipe the leaves. That is fine as long you spray thoroughly first so that the spray penetrates tiny crevices that wiping will not reach.
