Meaning of the word "fools and bairns should never see (a) half done work" in English

What does "fools and bairns should never see (a) half done work" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

fools and bairns should never see (a) half done work

US /fuːlz ænd bɛrnz ʃʊd ˈnɛvər si ə hæf dʌn wɜrk/
UK /fuːlz ænd beənz ʃʊd ˈnɛvə siː ə hɑːf dʌn wɜːk/
"fools and bairns should never see (a) half done work" picture

Idiom

a proverb suggesting that one should not judge a piece of work until it is finished, as those without experience or patience (fools and children) cannot imagine the final result

Example:
Don't criticize the renovation yet; remember that fools and bairns should never see half done work.
I know the painting looks messy now, but fools and bairns should never see half done work.