Reply To: Blender .fbx set-up for Substance import

[Charles]

Have since discovered that you CAN vertex paint multiple objects at once via the UV layout with the TexTools add on

4 objects selected in Object Mode

In TexTools
ColourID
Mode: Select Vertex Colours dropdown
Select colour and click save

IMPORTANT
Initially it kept painting black and I found out that you need to turn off unified colours in the vertex paint N-panel