I recently had shellac done - it lasted for 4 weeks and was brilliant and my nails looked fantastic. When she did it, I was a bit surprised that the technician went over my nail surface with a sort of emery board thing but thought nothing of it. Since the shellac came off, I have noticed that the nails look as if they have been "sanded" which doesn't exactly make them look great. Is it usual to "sand over" the nail before applying the shellac - I presume this was to make it stay on better which it certainly did? Unfortunately, it makes me think it is not worth having it done again when they look so awful afterwards.