TM 1-1500-204-23-1 pattern  uniformity  on  like  items  of  equipment,  painting and  highlighting  shall  be  accomplished  in  accordance with the general pattern shown in figure 2-2.  Equipment other   than   the   type   illustrated,   shall   be   painted   in accordance with these general instructions.  The painted finish   on   this   equipment   may   be   retouched.      The commanding   officer   or   his   designated   representative shall    determine    the    extent    of    the    touchup    allowed without complete repainting. (3) Natural     wood     pieces.          Wood     pieces     or equipment  finished  in  colors  other  than  those  listed  in paragraph 2-4c may be touched up with colors to match existing    finish,    provided    touchup    does    not    involve refinishing a total area equal to more than 10 percent of painted  surface  area.    When  more  than  10  percent  of painted surface area must be touched up, item shall be repainted with colors as specified. NOTE Instrument   repair   benches   or   other special  purpose  benches,  parts,  and equipment having natural wood finish   may   be   refinished   in   natural wood or white enamel, Federal Specification  TT-E-489,  color  shade 17875.    Working  surfaces  of  bench tops covered with metal or composition need not be repaired. (4) Start  buttons.      Start   buttons   shall   be   painted with   Federal   Specification   TT-E-489,   green   synthetic gloss enamel, color shade 14260. Figure 2-2.  Painting of Shop Equipment to Highlight Operator Position. (5) Stop  buttons.      Stop   buttons   for   electrical switches   used   for   emergency   stopping   of   machinery shall    be    painted    with    red    synthetic    gloss    enamel, Federal Specification TT-E-489, color shade 11105. (6) Hazardous     areas.          On     some     equipment, extremely hazardous conditions may exist, such as open flywheels, gears, or other moving parts which cannot be guarded or which might be impractical to guard.  These parts  may  be  painted  with  Federal  Specification  TT-E- 489, orange synthetic gloss enamel, color shade 12197. Overuse    of    orange    color    will    defeat    the    intended purpose,    therefore,    the    local    safety    engineer    shall determine the use of this color and furnish instructions. Painting of machined parts, such as face plates, chucks, spindels, etc, is not authorized. (7) Preparation for painting.  Prepare surfaces to be repainted using the following procedures: (a) Surface   should   be   clean,   dry,   and   free from  dust,  grease,  oil,  rust,  and  dirt.    Glossy  surfaces should be sanded to dull the gloss to ensure adhesion . Remove all rust and scale by scraping or wire brushing. WARNING Under no circumstances shall flammable  material  be  used  near  an open    flame.        Otherwise    injury    or death may result to personnel. (b) Remove   oil   and   grease   deposits   from machinery to be repainted with kerosene, ASTM D3699. WARNING Drycleaning    solvent    is    flammable and solvent vapors are toxic.  Use P- D-680,   Type   II   Solvent   in   a   well- ventilated   area.      Keep   away   from open     flames.          Avoid     prolonged solvent contact with skin. (c) Wipe surface with a clean cloth moistened with a grease-free solvent, such as drycleaning solvent, Federal Specification P-D-680, or paint thinner, Federal Specification   TT-T-291.      Repeat   this   procedure   until machinery surfaces are completely clean. (d) Bare    spots    resulting    from    scraping    or chipping  should  be  sanded  to  a  feather  edge  and  spot primed  with  lacquer  proof  primer,  Federal  Specification TT-P-664.    Allow  priming  coats  to  dry  thoroughly  and apply two coats of enamel, Federal Specification TT-E- 489, in prescribed colors. 2-5