Illustration Upscaling for UV Print

I need my illustration prepared for UV printing on a 46" × 34" rigid sheet. I already have the original file; however, the current version shows softness when scaled and loses fine detail. Your task is to boost resolution and sharpness so every line stays crisp at full size, and to refine overall clarity without introducing artifacts.

Please work directly on the source file, size it precisely to 46 by 34 inches, and deliver a print-ready file that a UV printer can accept without further tweaks.

Deliverables
• High-resolution, 46" × 34" file (TIFF, PDF, or AI) at print-quality dpi
• Layers intact where possible so the print technician can make last-minute adjustments
• Color profile embedded and a quick proof JPG for on-screen approval

Once I confirm the proof looks sharp and clean, I’ll sign off.

The TIFF file can be accessed through the below link. It is a large file (600+ MB).

Link: https://drive.google.com/file/d/1XkuJQjm3AfO_MLIaoZflz_jEEhVi41DU/view?usp=sharing