Some questions about brushing:
What is the proper technique for brushing? I'm wondering because I've heard people say that they have scratched shoe leather through vigorous brushing. Would this be due to improper technique, or a poor-quality brush?
Are there some brush brands that are considered to be better than others, and if so which ones would they be? Or does pretty much any brush that is 100% horsehair get the job done properly as long as you're using the right technique?
Should the technique change depending on the leather (e.g., calf vs. shell cordovan)?