I want to make plant identification signs that I can stick into the ground to let me and others know what plant they're looking at. The problem is that most things fall apart. Wood rots, steel rusts, plastic degrades in sunlight, ink fades etc. What is the easiest way to make signs that will last a long time? Barring any better ideas, I'll probably take stainless steel plate and grind the name on. It's just a lot of work.