TM 10-8400-203-23 I 3-5.   REPAIR   AND   MAINTENANCE   OF   BODY   ARMOR-Continued I (b) Check that the “size” is clearly and legibly marked to insure that the size designation of the insert unit (vinyl casing and ballistic insert) will not be lost. If the size designation is not legible, mark the proper size designation on the vinyl casing or the ballistic insert with ink in accordance with  MIL- I-6903C, Type IV, Black, or equal (Interchemical Corp. BL-13347 has been found satisfactory). (c) The outer shells shall be cleaned by machine using Formula II of FM 10-280. c. Inspection. Inspect the outer shell after cleaning to insure that seams have not opened up during cleaning and  that  components  operate  satisfactorily. d.  Outer  Shell  Repair  Procedure. (1)  Small  holes  or  tears.  When  repairing  a  small hole or tear in the outer shell of a vest in which the  vinyl  casing  is  not  damaged,  the  repair may  be  made  on  the  outer  cover  without  re- moval  of  the  vinyl  casing  with  ballistic  insert. To repair the hole or tear in the outer cover, cut a   patch   of   matching   cloth   (nylon   oxford) 1-inch (2.54 cm) larger in each direction than the hole tear to be repaired (preferably circu- lar patches). Apply the adhesive patching ce- ment on the patch over the hole and press or roll  the  surface  firmly  together.  Allow  the  ad- hesive  to  set  for  15-20  minutes  before  sub- jecting  the  vest  to  severe  handling  or  water immersion. 3-6