Neither Office Depot nor Staples has any pencils other than #2s. Where are you getting #4s?
Stationary or Art store should have a nice selection. Best thing about the # 4's, the graphite is so hard it never wears out. I just ligthly sand the tip and almost never have to actually resharpen the pencil.
I double mat most of my photos. I sign the work on the mat nearest the glass on the lower right with the title to the lower left and the copy number (edition #) closer to my signature. I also use the same information and location below the image of the board on which the photo is mounted (t-hinged). All the mat boards are t-hinged and I use an H pencil to sign everything. I find that softer pencils will smear.
Stationary or Art store should have a nice selection. Best thing about the # 4's, the graphite is so hard it never wears out. I just ligthly sand the tip and almost never have to actually resharpen the pencil.