Can generated mesh be enabled to read/write?

[scr33ner]

I'm using an asset that needs mesh to be set to read/write for the vehicles to work properly.
   

To make this work, I have to:

1. save mesh
2. export to fbx [of note; this still does enable R/W for the mesh so...]
3. import to Maya
4. RE-EXPORT fbx to enable read/write

Thanks in advance