Use a paintbrush to apply a generous layer of paint stripper to the furniture. Allow the stripper to sit for about 10 minutes. Scrape the finish off with a scraper and a stiff bristled brush. Sand the entire surface with fine grit sandpaper. Wipe down with tack cloth. Brush on one coat of primer and allow it to dry. Finish with exterior paint and a coat of sealant after the paint is dry.
Use a sealant on bare wood to prevent rot and mildew. Sealant creates a waterproof barrier that protects wood. It can be sprayed or painted on with a brush, and dries in about eight hours. Apply two coats or more to ensure the wood is sealed.
Waterproof any fabric or replace it with an outdoor safe material. Waterproofer is available in the laundry aisle, used in the washing machine, and set in the dryer. Spray a stain repellent on the cushion for added protection before recovering with treated fabric.
Use a waterproof lacquer to protect steel, copper, wood, or aluminum. It not only protects against rainfall, but also wind, salt and UV rays. Sealing your furniture--even if it seems to be water resistant--can keep it from rusting, rotting, peeling and flaking, so don't miss this step.