This is not gun-related but, helpful. Many times I mark hard smooth surfaces with my Sharpie. Later I have to change what I wrote and things get messy. The ever-knowing Internet showed me something today. When wishing to remove permanent marker writing...Simply go over the original writing with the Sharpie again, and quickly, (before it dries) wipe the writing off with a rag or paper towel. Bingo! You end up with a clean surface. I spent a good 1/2 hour this morning removing old writing from plastic ammo boxes. Now I can write on them again. LOL.