On liquid soap bottles, regular labels that get wet run like mad. I find weatherproof label paper very expensive, so I’m experimenting with spray-sealing my labels. I bought a can of matte-finish acrylic spray seal for this from Amazon (the kind people use on finished paintings.) I find that it doesn’t matter if I spray the label on the bottle or on the sheet, I still get a nice water-proof effect. So very much cheaper than weatherproof labels! Is there a downside I’m not seeing?