be repaired by brush or conventional spray equipment. If texture is desired in small areas, stippling with a stiff, short bristled brush, or scotch brite pad, using hi-speed lacquer at unthinned consistency, is recommended.
(b)
Minor Repairs in Haircell Textured Surfaces (Cuts, Gouges, Tears) 1) Prepare surface by removing burrs and solvent wiping with naptha. 2) Prime edges of damaged area with Eastman 910 adhesive to prevent shrinkage
of vinyl.
NOTE: Do not apply an excessive amount of adhesive as an excess will inhibit cure. store Eastman 910 adhesive in a closed container and in a cool place when not in use.
3) Allow adhesive to dry for 5 minutes.
4) Fill damaged area with Snowite plastic or Ditzler DX-888 Mender and sand to fair with panel surface. If Tedlar is on decorative surface, roughen to promote bonding.
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5) Dilute Duratite surfacing putty with toulene and spray to match surrounding texture. Allow putty to dry for 30 minutes.
6) spray repaired surface with previously color-matched vinyl ink.
(c) Major Repair of Coating (Refinish of Large Areas to Restore Texture) 1) Solvent clean area to be repaired using BMS 3-2 solvent or naptha. 2) Mask surfaces surrounding area to be repaired. Apply base coat of hi-speed
lacquer to all areas where substrate has been exposed or where color hiding is inadequate. color of base coat shall be identical to that of texture coat. Base coat is applied with conventional spray equipment to full color hiding and smooth, uniform film. Allow base coat to dry at least 30 minutes before applying texture coat.
3) Texture Coat - Apply hi-speed lacquer without thinning using pressure feed spray equipment. A DeVilbiss JGA 502 spray gun with AV-15-E head, 402E needle and 765 air cap is satisfactory. Line pressure of 25 psi and spray pot pressure of 5 psi are recommended. Spray gun should be held approximately 12 inches from surface to be coated. Apply cross coat to obtain desired texture. Allow to dry at least 30 minutes between spray passes. One cross coat normally consists of two passes of spray gun with one pass crossing the other at right angles. Masking lines can be obliterated by stippling with a stiff, short bristled brush, or scotch brite pad using hi-speed lacquer of unthinned consistency.
AB. Repair Method No. 26
(1)
General
(a) This method is for the repair of Duracote 200A construction, a smoke stain resistant coating.
(2)
Equipment and Materials
(a)
Duracote S-25 (top finish)
(b)
Air brush
(c)
Duracote 027.5 (dulling agent)
(d)
Lacquer - hi-speed
(3)
Repair: (Clear Coat)
(a)
Repair base material per methods listed in Fig. 201. Base materials are usually vinyl.
(b)
Coat repaired area with Duracote S-25 top finish or Sherwin-Williams Hi-Speed Lacquer. Apply 4 or 5 passes by spraying with an Air Brush, allow drying between passes. Gloss can be altered by adding Duracote 027.5 dulling agent (15% by weight) to S-25 top finish. Sherwin-Williams Hi-Speed Lacquer can be obtained in various degrees of gloss. S-25 may be thinned with a 50-50 mixture (by volume) of tetrahydrofuran and cyclohexanone for spraying.
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AC. Repair Method No. 27
(1)
General
(a) This method is for the repair of Tedlar-Conolite paper honeycomb laminates where the Tedlar-Conolite decorative face sheet of panel requires removal due to scuffing, scratching or complete penetration of the Tedlar overlay. the materials used in this repair are Skydrol resistant when fully cured.
(2)
Equipment and Materials
(a)
Adhesive - Epoxy Polyamide BMS 5-29, type 3
(b)
Aliphatic Naphtha TT-N-95
(c)
Roller or serrated metal spreader
(d)
Clean gauze pads
(3)
Repair (Tedlar-Conolite paper honeycomb laminates)
(a)
Remove decorative Tedlar-Conolite face sheet from honeycomb by either of the following methods: 1) Remove Tedlar and adhesive from Conolite by sanding. Remove sufficient
facing material to ensure a smooth flat surface. 2) Strip Tedlar-Conolite laminate face sheet from paper honeycomb. Use care to prevent damage to honeycomb core and to maintain a flat surface.
(b)
Combine components of adhesive and thoroughly mix together in a clean wax-free container, taking care not to trap excessive air in mixture. Mix components in following proportions:
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