The wounds will scab up and then scale over slowly. You may have to help those areas shed for quite a while.
One of my retics had surgery earlier this year, and the incision is a few inches long. That area will probably always have issues shedding, and after that girl "pops" her shed I either apply a warm, damp rag to the area to help soften the shed and remove it, or if the weather is nice she goes outside into the baby pool for a swim.