The phrase "and keep the surface" is correct and usable in written English.
It can be used in contexts where you are instructing someone to maintain or preserve the outer layer or appearance of something.
Example: "When applying the paint, be sure to sand the wood lightly and keep the surface smooth for a professional finish."
Alternatives: "maintain the surface" or "preserve the surface".
This will seal the area and keep the surfaces protected.
"We're doing this in order to ultimately conserve the underlying natural fabric which feeds our society, feeds human beings and keeps the surface of the earth alive".
The so prepared pellets were mechanically resistant and kept the surface area of the base materials.
However, when welding a tube to another tube, a combination of blowing and suction, and pressing and pulling is used to ensure a good seal, to shape the glass, and to keep the surface tension from closing the tube in on itself.
Third and to keep the surface tension constant, the increase in droplet surface area would spontaneously be compensated by fibronectin adsorption from the bulk, a process that would be accelerated as monolayer material is transferred into the fiber.
To counteract this effect, scientists have been attempting to develop surfaces that repel bubbles and keep the boiling surface wet.
The field, part of a city-owned park complex, has been worked on over the past week, with a tarp covering it during recent snowfall and heaters used to keep the surface from freezing.
Polishing pastes contain fluoride to help strengthen your teeth and prevent tooth decay, and abrasives like siliceous minerals to keep the surface of your teeth smooth and shiny.
A mulch is simply a kind of ground covering to stop the weeds, keep the surface and the roots cool and, best of all, to conserve moisture in the soil.
2. Begin kneading the bread; the dough will be sticky, but keep the surface and your hands only lightly floured and incorporate as little excess flour as possible.
