The peas/beans can soak for up to 24 hours (at room temperature on the counter part of the time, then covered in the refrigerator or a cool room for overnight). The longer the soak, the easier it will be to remove the external bean skins. However, if a few of the black specks or bits of “black eye” from the pea skins stay in, that's fine--“perfection is the enemy of the good." Tahini consistencies do vary greatly by brand--this one is based on using a creamy liquidy style or version that doesn’t easily separate (sesame oil from paste). Don’t panic when the creamy texture of the tahini turns into a dense, almost flaky paste after the vinegar is added; that’s what the warm water is for--to loosen it back up!