The phrase "as a blemish" is correct and usable in written English.
It can be used to describe something that is perceived as a flaw or imperfection in a broader context.
Example: "The report was well-written, but the lack of data analysis stood out as a blemish in its overall quality."
Alternatives: "as a flaw" or "as an imperfection".
Golovkin, without so much as a blemish on his cherubic visage, continued to mete out punishment.
One of them described the row as a "blemish" on the university's reputation as an upholder of freedom of expression.
Instead, it sees Guantánamo as a blemish that should not take away from all the good that American society has done.
Some skiers see artificial snow as a blemish on cross-country's image as a wholesome, green alternative to the glitz and machinery of downhill skiing.
An obstacle, I point out, are Japanese managers themselves, who are often reluctant to merge because it disrupts the corporate culture and it may be seen as a blemish on their abilities an admission that they cannot succeed on their own.
But the long day of often-testy exchanges between committee members and their prominent witness revealed little new information about an episode that has been the subject of seven previous investigations, and that Republicans have long seen as a blemish on Mrs. Clinton's record that could be exploited as she sought the presidency.
In this case, a mistake and the need to apologize, can be experienced as like a blemish that needs to be hidden.
A "raza", meaning a stain or taint (as in a blemish on a shirt) came to mean that certain races were permanently tarnished at the level of blood, a tarnish that could not be altered by religious conversion or education.
He admitted that he could not expect mercy, but asked for it anyway, so as not to leave a "blemish and blot unto all ages".
The sport is carefully marketed on television as an aesthetic female fantasy — girls performing death-defying feats without so much as a single blemish of what they have gone through.
And this passionate opponent of racism and apartheid forgives her hero's racism as a minor blemish in a 'great tree' towering over all the rest in the political forest.
