Save growth chart on the kitchen door jamb

We made pencil marks and wrote dates on the kitchen door jamb as our son grew and have avoided painting it for years. I don't want to transfer these marks to a growth chart (as some internet commenters suggest), but I do want to clean up the area. What kind of indelible marker pen might I use to preserve the record that would not wash off when I clean the door jamb with 409 or some such?

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