Yup, brushing will help. I use several different tools on Mystic who has the most dandruff of all 5 of mine. I use a kitty comb (for fleas actually), a kitty brush, and a shedding tool. Here are pictures of what I use. I have found the shedding tool to be the best in helping with the dandruff.





The one on a handle that loops back around is what I find to work the best.