Mobile Material Draw Order

I would like to draw a material last on mobile so it will render over all others.
Can you advice on how this can be achieved? If needed I don’t mind getting into the engine code and hard-coding a hack if you could point me in the correct location for mobile rendering. The ‘Disable Depth Test’ is a known bug on mobile, however I need to fix / find an alternate solution to this asap.

Edit: alternately the model can be rendered last rather than just the material if the render order / layer can be changed from that level?