General Finishes offers 2 exterior topcoats, an exterior water-based stain, a highly durable paint, and an outdoor oil for outdoor projects. Exterior 450 Stain, Exterior 450 Topcoat, and professional Enduro 2K Conversion varnish are suited for vertical surfaces fences, patio furniture, garage doors, and entrance doors. These 3 finishes are not recommended for large horizontal surfaces such as decks. Our interior/exterior acrylic Milk Paints are can be used for indoor or outdoor furniture, crafts, cabinets, millwork, garage doors and decks and can be sprayed to produce a high-quality satin sheen finish. And if your wood just needs a preservative treatment, try our Outdoor Oil. Note: do not apply Conversion Varnish over Milk Paint in an exterior project.