Billboard Graphic Enhancement Needed

I have an existing billboard design whose graphics need a quick yet professional polish. The layout and copy are staying exactly as they are; what I’m after is a visual lift that comes from enhancing the current artwork itself.

Here’s what I need from you:
• Sharpen and upscale the image so it prints crisp at full-size (Increasing resolution).
• Fine-tune brightness and contrast so colours pop without losing detail (Adjusting brightness/contrast).
• Apply tasteful effects or filters that give the billboard a modern, eye-catching finish while remaining faithful to the brand (Adding effects or filters).

Please work only with the graphics already in place—no new elements, no removals—just a clean enhancement pass. Final deliverables should include the updated layered source file and a print-ready high-resolution export. If this sounds straightforward to you, I’m ready to get started right away.