Ideally you need to get a 2" Norton 4k/8k waterstone. 3" is ok if you can't find the 2". That should be ok for restoring mildly rough blades. If you don't feel like spending that much money, look into the Japanese slip stones. Get the 4k and 8k. http://w-u.com/wucatresults.htm?snum=26375 They were advertised as Chinese but when I picked'em up from their CDN distributor, they had Made in Japan labels. With them I was able to keep my blades shaving very nicely and they're cheaper than the Norton. Since they are wedge-shaped, you need to place one on top of the other to get a flat surface. Norton is easier to work with because it's longer and it cuts faster but these will get the job done on a budget. Only after getting it nice and sharp on either of the two alternatives is your razor ready for a finishing hone. However, I didn't find any distinct benefits unless you use a larger Coticule, a Shapton Pro Series or a few other pricier hones. Don't use that razor until you hone it on 4k/8k stones. Good luck!