Not quite as elaborate as KG’s, but when I lost our dipstick (left it on the wing and then took off… 🙄🫤), I just used some Bunnings dowel (can’t remember if it was pine or tassie oak, probably pine), and tattooed lines and numbers on it with a sharp point. Otherwise unfinished. It was quite readable and I don’t remember it wicking, though I expect that we did a quick dip-and-read so I don’t know if it had time to wick.
Hint for young players. Don’t lose your dipstick, ‘cause if you do, you have to drain your tanks to calibrate a new one. No fun.