All of the books I've read about painting recommend that you first prep your walls by filling in and sanding any nail holes. I don't want to do that though because I like my nail holes just where they are! I have a lot of pictures hanging on my walls and I don't want to have to arrange them & nail new holes all over again when I've done painting. Is it okay to leave the nails in and paint over them, or should I paint around them? Does anyone know what professional painters do in this situation? Thanks for the help.