If you are very careful, you can indeed make them less noticeable by using a very fine brush dipped in alcohol (methylated spirits is fine) to moisten the edges of the scratches. Just enough to soften the shellac, not wash it off. Then polish with a linen rag around the scratches, using a very light action, so that you spread the softened shellac into the scratches. Not easy to do, but you can take the highlights out of the scratches.