Name: Glen Ingram Macleay Is, Qld, Australia (Zone 12a) (Lee Reinke X Rose F Kennedy) X Unk
Mine are plastic knives with Artline 70 High performance, permanent markers used to put a number and name. These also go back to an Excel entry and map. If one fails the other should work (touch wood).
The problem is that when you are young your life it is ruined by your parents. When you are older it is ruined by your children.