Having given a basecoat of Humbrol Dark Green to the underneath of the model to add shadow the next stage was to do the main basecoat of Warpaint British Armour.
As you can see the basecoat has not coated the tank completely.
Looking at it, it might need a second coat, though I think a wash may solve some of the “white” problem.
Here’s the model with a second coat.
See the workbench feature on the Cromwell ARV.