Please give me some input. Is it better to go with aluminum tags or zinc tags on your plant stakes? I don't mean the soft, foil like aluminum tags--at least I don't think that those are the ones sold at Paw Paw Everlast Garden Markers? ( I do use sticky labels on the tags, so how well a marker holds up is not an issue for me.) What are the up and down sides of each material? Thanks!