No, a new cast iron skillet should not have rough spots and jagged edges. A properly manufactured and well-finished cast iron skillet should have a smooth cooking surface with no rough areas or sharp edges.
Good quality cast iron skillets go through a manufacturing process that includes smoothing and polishing the cooking surface to make it even and suitable for cooking. This process involves grinding and buffing the cooking surface to remove any imperfections and create a smooth, non-stick surface.
However, it's essential to note that not all cast iron skillets are created equal. Cheaper or lower-quality skillets might not undergo the same level of finishing and may have rough spots or uneven surfaces. When purchasing a cast iron skillet, it's a good idea to inspect it carefully for any defects or rough areas before making a purchase.
If you happen to encounter a new cast iron skillet with rough spots or jagged edges, it may be a manufacturing defect or damage that occurred during shipping or handling. In such cases, it's best to return or exchange the skillet for a properly finished one to ensure optimal cooking performance and ease of use.