It is possible to sand out some degree of snipe but this could be very time consuming. However, a belt sander could cut this time down significantly when compared to manual hand-held sanding. However, the thickness of the affected area depends on how well sanding could work.
If the snipe is very small and light, you could get away with a little sanding on those areas. You could even run it through a planer again at a smaller thickness but if you opt for this method, you must ensure that it doesn’t repeat any sniping again.
If you’re hand sanding, use stop shavings when you sand the centre section only. Do this until you’re down to the level of the sniped areas and then opt for full-length shavings.