We live our Sunbrella outdoor curtains but the wind is causing trouble. We bought the weighted panels but it's not enough weight. I thought I had a brilliant idea in putting light chains in the bottom pocket of each panel. However, a Lowes employee said there is NO metal we could use that wouldn't eventually rust or corrode. So....what other options would I have for weighting the panels? Seems like metal objects are not an option. What about a chain covered in plastic?? And where would I find such a thing?