The phrase "a skim of" is correct and usable in written English.
It can be used to refer to a thin layer or a light covering of something, often in the context of liquids or substances.
Example: "There was a skim of frost on the grass in the early morning."
Alternatives: "a layer of" or "a coating of".
Trout ($16) is dressed simply, with pickled beets and shallots, atop a skim of horseradish cream.
The next morning there was frost in the meadow and a skim of ice on the pond.
At first we think it's just a skim of mud on the pots we find still neatly stacked in a swollen cabinet we manage to force open.
It starts with the first ice that "came on the sheep pails in the barn — a skim of ice so thin that it broke when we touched it".
He employed a skim of transglutaminase, an enzyme known as "meat glue," to bond two separate lamb breasts together — the narrow side of one matched to the thick side of the other — creating a single rectangular slab of meat.
The sheep's milk cheesecake seemed weightless, but the panna cotta topped with a skim of lemon gel was thick, tough and should not have left this otherwise careful kitchen.
What makes it beautiful is a gentle sensuality quite rare for her, a dipping of the head, a skimming of the feet that to an English viewer is reminiscent of Frederick Ashton.
After a skim coat of plaster, Mr. Imbaquingo painted the walls white.
The only surfaces intact were the beams, the ceiling and the flagstone in the entryway — and even that was under a skim coat of concrete".
Here, under a mere skim of mozzarella and a lick of down-home tomato sauce, a wafer of eggplant wrapped a core of creamy ricotta.
In today's climate a simple skim of the comment section on a Facebook post reveals a fair share of adults who believe they can say and do whatever they please and are above any repercussions.
