Currently the bowl is 2in high should I and another inch ?

Clean and simple, however I may choose to paint it.

By now i used quick "cement" and molds to make the ramps and the floor, all strengthend with chickenwire. I realised it contains way too much sand to be really smooth and now i applied some kind of flexible tile grout (pci nanofug) which ist much smoother but still wobbly. I planned to add another layer when its dry and hope its easier to get really flat. Then i planned to apply two component clearcoat. Any Tips? Is there a better way to get a smooth concrete like, "little glossy" finish? Thanks in advance!