When you unmolded, was your soap still slightly warm? Also, were your blotches somewhat large, random, watercolor looking? First looked like water, but as the soap aired out, "wet" parts were a bit lighter in color, like have a film of something (zappy stuff?) If that's the case, overheating. It is "lye sweat". I have HDPE mold, and stick the soap in the oven to gel. Sometimes I get that lye sweat (usually if I'm impatient and overheat, then unmold too early). I've done two things, either wiped the lye off, and after cutting the bars beveled all the sides that have spots on them (it takes only one stroke and all the spots are gone), or gave the entire log a wash (weird, I know), set in on the shortest side to dry off, then cut. After either the bath or shave the bars were perfect, mild enough for washing the face.