Q.Scale on Rose Bush
What can I do about scale all over my rose bushes?

First we need to be sure that it is in fact Scale that we are dealing with. Here is a link to a good informative article on Scale with pictures: http://ipm.ucanr.edu/PMG/PESTNOTES/pn7408.html#MANAGEMENT
To control the scale problem, here is a link to a spray concentrate that will take care of the problem if it is scale.
https://smile.amazon.com/gp/product/B000BX4RNW/ref=oh_aui_detailpage_o04_s00?ie=UTF8&psc=1