Copper kills slugs where as salt only dehydrates them, but they continue to live....Penny Ball for the garden. Pennies in the garden repel slugs and make hydrangeas blue. I love this idea. It looks old and new and beautiful.
1982 She says, “I used a cup of hydrogen peroxide and 1 cup of white vinegar and two tablespoons of salt and put it in a spray bottle. I’ve also used straight vinegar before with salt to get similar results but the hydrogen peroxide seems to really speed it up! This can be used on anything you want to create an aged patina, copper, brass, galvanized or steel.”