Protecting Oak Staircase From Plaster

[Lincolnshire Ian]

Hi folks

As we creep towards the end of the build I'm starting to think about how I can keep plaster off the oak stair parts. I have been told by several people that a splash of plaster on oak can turn it black. 

I have coated the oak elements with three coats of Osmo which I am hoping to help and then I will use delicate surface frog tape and some plastic sheeting to try and cover every part of the oak. 

Is there anything else I should be doing? 

Thanks