skin compression

So I've been working on a skin for the Ferrari FXX-K for the past few days (a 4K super accurate version of car #13). It's the first time that I'm working with a transparent skin. I've been working the entire time in Photoshop with CM Showroom open to preview it on the side. This is the result in...

I'm trying to recording a replay but I want to get more quality in my skin (2k resolution) if I need to change values in the notepad or ... just let me know please!