Pool patch recipe

[Sumo1]

I need to patch a couple of worn spots in a plaster pool but am not ready to spend for a whole replaster job. I've been told to use a mix of white portland cement and white marble dust. Does anyone know the correct mix ratio to use? Thanks
Hal

[Sumo1]

I need to patch a couple of worn spots in a plaster pool but am not ready to spend for a whole replaster job. I've been told to use a mix of white portland cement and white marble dust. Does anyone know the correct mix ratio to use? Thanks
Hal

Still looking for help...

[GutierrezPlastering]

mix 1 portland 2 marble dust if it fits in the wheel barrow; or 1/2 portland and 1 marble dust; mix for 5-10 minutes till you have a wet but somewhat stiff substance