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из говна конфетку не сделаешь stresses
gen.	you can't make a silk purse out of a sow's ear (Игорь Primo)
fig.	you can't make a peach out of a potato (Ремедиос_П); you can't make candy out of trash (Ремедиос_П); you can't make candy out of rubbish (Ремедиос_П); you can't make candy out of shit (Ремедиос_П)
idiom.	GIGO ('More)
inf.	you can't polish a turd (Franka_LV); garbage in, garbage out (4uzhoj); shit in, shit out (Don Quixote)