I tried to wipe some grease/tar off of my one cat the other day and she let me have it good and swatted my hand, claws out and all, and left some pretty deep cuts. I don't know what she got into but she must have rubbed up against something in our garage and had a big brown streak of grease on her. Of our two cats, she's definitely the bitchier one, lol, and does not like to be handled much. I should have known she was going to do that because she was watching me with this crabby look on her face while I was trying to clean it off with a damp towel. I just didn't want her trying to lick it off herself and possibly get sick.