DIY Outdoor Wooden Decoration Protection Kit

The user wants to protect plywood Christmas decorations from the elements and is seeking advice on coatings. While existing products are mentioned in comments (automotive clear, outdoor clearcoat with UV, 2k clearcoat, water-based varnish), there's an opportunity for a complete, user-friendly DIY kit specifically marketed for outdoor wooden decor. This kit could include a non-yellowing, UV-resistant clearcoat, application tools (brush/roller, specific sprayer if needed), and detailed, easy-to-follow instructions, catering to hobbyists who want to preserve their items without sourcing multiple industrial components.