Furthermore, as shown in FIGS. 3A and 4A, the hollow barrel sleeve 10 of the liquid marking and eradicating instrument 1 may alternately have annular gripping cushions 10a and 10b, of rubber, foam or other suitable material, such as a malleable cushion of a flexible polymer, which conforms to the contours of the fingers of the user, such as writing pens sold under the trademark Dr. Grip???.