Good point, leaving a step for the texture break is important to help them mask off the area when they are processing the steel depending on what textures you are using.
When using polished textures near other textures, you need to remember that a person will be going in by hand to polish the cavity of the tool, so if that area is difficult to access they may accidentally polish surfaces across that boundary which never looks good.
Always good to have the CMF discussions early so you can modify or plan accordingly.