Quote Originally Posted by Tobus View Post
There aren't any fats or oils left in the wool by the time it is made into a kilt. When tartan is woven on the loom, it may still have a bit of oil or "grease" in it, but the finishing process includes scouring and pressing unless you custom order it to be "in the grease", which most mills are loathe to do. They prefer to just send it off for regular finishing. But standard tartan cloth really doesn't have much, if any, lanolin in it to worry about.
I've never heard of "in the grease," but honestly, it doesn't sound very appealing. Standard finishing is fine for me.