Steam Hsc Gp38-2 Livery Editor: Broken Projection Settings

Hello

I am using the HSC GP38-2 as a base for a Grand Trunk Western livery, and I've run into an issue where the handrails and other protruding objects cannot be painted using layers, only taking the paint color. I've included some screenshots of the offending areas.


This is when I have the paint being blue and try making the handrails white


And if I change the paint color to white, this happens...

Is there any fix? I tried removing all the mods I have and nothing changed and I could not find anyone else talking about this issue. I've put quite a bit of effort into this livery so far and would like to continue with this version of the GP38-2.