To purchase this Sefer, click here
3. Smearing fat and oil:
Smearing oil: It is permitted to smear [oil] [See “The Laws of Smearing Oil” regarding using scented oils] with ones hand over ones entire body for pleasure. [Thus, doing so does not contain the smoothening prohibition.]
 Admur 327:1
 Admur 328:28
 As for why it is not forbidden due to the smoothening prohibition-See “The Laws of melting…” Q&A there where the Ketzos Hashulchan explains why there is no Mimacheik prohibition by soap.