Adjusting shape of shotcrete pool?

[imfignewton]

Shotcrete properly applied will not have a bonding problem. Make sure you can extend your jets if on these walls.

[octpool]

Do I have to add additional shotcrete as I'm only adding two inches thickness to a 48inch wall? I was thinking building up some epoxy/concrete compound that can be mixed in small quantities, I assume shotcrete requires pumper truck etc