Rusks are hard, dry bread which are baked twice. Cutting rusks is definitely the toughest job out of the entire process. For getting the perfect slice, try the wet knife method. Basically, place in a greased pan and cut them into slices with a wet knife before putting it into the oven. Now place the pan into the oven and the cut slices marks can be traced to use slice them again. This method makes the process a whole lot easier!
If you want smaller portions of rusks, Woolworths cut method would be affective. Place the dough mixture evenly into the greased pan over the baking sheet. Now put the pan into the oven and bake for about 20 minutes at 350 degree. If a toothpick comes out dry, your rusk is baked. Let it cool down and then cut down in smaller portion slices with a sharp knife. As the portions are smaller, the slices will come out clean.