I was working on an order for 30x45 and 40x60 prints and thought it might be helpful to give a look at the steps I follow when profiling for optimal colors, brightness and contrast (soft proofing), creating small test prints (hard proofing), enlarging the image and making sure the fullsize image is as clean and sharp as possible before uploading it to the print lab.

In the video I soft proof in Lightroom. I also have an older video where I show soft proofing in Photoshop:    • Build A Photoshop Action For Soft Pro...  

Some hard proofing tips:    • Hard Proofing for Optimal Fine Art Pr...  

Some basic printing workflow tips:    • How To Get Great Online Prints  

I also mention HD Aluminum Prints in the video. Check them out: https://www.hdaluminumprints.com/