TM 1-1500-204-23-3 (13) Allow   finished   repair   to   set   for   4   hours before moving fuel cell. (14) Allow   finished   repair   to   air   cure   for   24 hours   at   room   temperature   of   70 °F   (33°C)   minimum before use. h. Fitting Rework. (1) Fittings   having   surface   corrosion   and/or scratches,  within  allowable  limits,  can  be  reworked  in accordance with the following procedures. WARNING Wear     rubber     gloves     and     eye protection throughout fitting rework   procedure,   except   when using emery cloth and Scotchbrite pad. (2) Rework fitting as follows: (a)    If   there   is   heavy   accumulation   of grease,  oil  or  dirt,  or  if  the  metal  is  severely  corroded, dean with a piece of dean cheesecloth (item 16, table 2- 11  )  dampened  with  acetone  (item  3,  table  2-11).    If acetone   does   not   completely   dean   fitting   or   acetone beads  up,  dean  fitting  with  a  commercial  cleaner  (i.e. Ajax) (item 26, table 2-11). (b)    After cleaning, wipe or rinse cleaning  agent(s)  from  fuel  cell  fitting  and  surrounding area with water. (c)    Immediately prior to rework, wipe all contaminants   from   the   fitting   using   a   dean   piece   of cheesecloth    (item    16,    table    2-11)    dampened    with acetone (item 3, table 2-11). CAUTION Metal applicators, cleaning devices  or  materials  shall  not  be used  under  any  circumstances  in this procedure. (d)    If metal is severely corroded and/or there  are  scratches  or  gouges,  buff  with  emery  cloth (120  grit)  (item  17,  table  2-11)  until  surface  is  free  of corrosion, scratches and/or gouges. (e)    Using   fine   emery   cloth   (300   grit) (item   13,   table   2-11),   sand/polish   surface   previously buffed  with  120  grit  emery  cloth  (item  17,  table  2-11) until surface is smooth and free of buffing scratches. (f)    Remove any exposed surface corrosion which lies above the normal metal surface or which   appears   loose   or   powdery   by   rubbing   with   a Scotchbrite pad (item 12, table 2-11). (g)    Wipe   off   residue   with   a   piece   of dean  cheesecloth  (item  16,  table  2-11)  dampened  with acetone (item 3, table 2-11). WARNING When  working  with  alodine  1200 wear  gloves,  safety  goggles  and protective clothing. Wear a NIOSH    approved    respirator.        If contact  occurs,  flush  areas  with water and get medical attention. CAUTION If  artist's  brush  has  metal  bristle retainer,   wrap   the   retainer   with two  layers  of  masking  tape  so  all of the retainer is covered. (h)    Apply,  brush  Alodine  1200  coating (item 14, table 2-11) liberally to the metal surface using artist brush (item 15, table 2-11) or equivalent and allow to stand one (1) minute. (i)    Apply   additional   coats   of   Alodine 1200  (item  14,  table  2-11)  at  one  (1)  minute  intervals until a light gold or tan color appears.  No more than five (5)   coats   are   required   for   coating   formation.      If   no coating occurs, reclean the surface and reapply Alodine 1200 (item 14, table 2-11). CAUTION Wash the brush thoroughly in water immediately  after  use,  as  the  Alodine  1200  will  attack the bristles. (j)    Flush the work area thoroughly with distilled  water  (item  11,  table  2-11  )  followed  by  wiping with a clean piece of dean cheesecloth (item 16, table 2- 11). Change 2  2-54