Permanent Marker on a Wood Table?
My grandson wrote with permanent marker on my wall and I used hand sanitizer and it came right off. Maybe it will work for you.
Help My Cactus?
Your cactus is a grafted cactus if you search them or google them you may find a solution. Sometimes the top part dies and your left with the bottom part it was grafted or glued to. Is it still humping along or is it dead by now?