Memachaik
From Halachipedia
Memachaik
The Mishnah in Masechet Shabbat (73a) lists memachaik as one of the 39 Avot Melacha. This is defined as scraping or removing a surface to leave a smooth remainder. For example, using sandpaper to smooth wood, or scraping hairs off a piece of leather to make it smooth <ref>Rambam Hilchot Shabbat 11:5
Mimareach
One of the toladot of this melacha is mimareach-smoothing not by eliminating surface, but by spreading something over the surface. <ref> Rambam Hilchot Shabbat 11:6
