I ' m using the Industrial Sharpie . It seems semipermanent for now . When I rub my fingers over it , it doesn ' t smear or smudge and I ' m not worried about the design coming off . I ' m following the route of once it goes on , there ' s no redo so I haven ' t really tested any cleaning agents on it . That said , you can feel the ink on top of the helmet so I bet if you wanted to , you might be able to scratch it off with your nails ? edit a word <| sep |> I ' m not going to put all tge blame on them , but my family didn ' t really help my problem . Of course I got the clean plate club thing as a kid and once upon a time at my aunt ' s house they started wondering why I never ate breakfast . I just told them I wasn ' t hungry in the mornings . Bbut no ! That ' s unacceptable ! Breakfast is the most important meal of the day !