REPAIR INSTRUCTIONS USING FIBER GLASS MATERIAL6.Apply the mat and cloth patches, pressing thelaminations down tightly with a sheet ofpolyethylene film to produce a tight bond (Figure48). (The closest patch is installed last.)NOTE - When repairing large holes, place theentire patch (including plyethylene film) asprepared in Step 5, on the repair surface andpress the patch onto the metal. Leave thepolyethylene film as a cover over the patchuntil the resin has cured (Figure 49).Figure 48. - fiber Glass Mat and Cloth Patch InstallationFigure 49. - Applying fiber glass Patch7.Allow the material to cure. Then, peel off thepolyethylene film if it was not removed earlier.8.Sand and file surface after the patches havecured.9.To complete the repair, use the procedure forsurface filling and Finishing (page 15.Repair Using Metal Insert1.Perform the steps listed under PreparationProcedure (page 5).2.Using the appropriate tools, cut the rusted ordamaged material from the panel.3.Using an air hammer and a panel crimper, forma step in the original panel so that the new sheetmetal or aluminum insert will set flush with theoriginal panel (Figure 50).Figure 50. - Forming Insert Step in Original Panel4.Cut a new sheet metal or aluminum insert to fitwithin the step area of the panel being repaired.5.Attach the insert to the original panel by spot ortack welding it in place or by securing it with poprivets (Figure 51).NOTE - If pop rivets are used, countersinkthe holes in the insert so that the rivet headswhen installed are near flush with theexterior surface of the insert.Figure 51. - Panel Metal Insert Attachment.CTS-4049Page 15
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