I hate that as consumers we feel limited to keep indoor items inside and outdoor items outside. Break the stereotype! You can weatherproof just about anything if you have the right products.
Thompsons Water Seal: Ideal for Wood, Concrete and BrickThis product is so simple to use and can be applied to any furniture piece you'd like to keep outside. It helps to prevent water damage and says "it allows wood to gray naturally." Do not use on plastic or recently painted items.
Scotch-gard Water Shield: Ideal for Fabric, Clothing (aprons, jackets, etc.) canvas, umbrellas and patio furniture.I LOVE this product. You are no longer confined to "outdoor" fabric for your cushions. This product repels rain, snow and moisture. It allows fabric to still breathe while quickly drying after water exposure. I would suggest doing three even coats when first applying and another coat each season.
Rust Stop Outdoor Paint (any brand): Ideal for metal products
You can easily coat any metal product with rust stop (outdoor rated) paint. You can prevent peeling, chipping, heat damage, fading, and more from weather rated paint. You'll be wasting your time and money if you use indoor paint for items that will be exposed to the elements. You can now bring your home decor items outside. I have painted my wood rack, metal folder chairs, house numbers, mailbox, planters and more. The possibilities are endless!