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6 Painting/Finishing
Question | Answer |
---|---|
Why is Butyrate dope safer to use than nitrate dope? | It is much less flammable. |
What are the two types of dope used for fabric finishes? | Cellulose nitrate and cellulose acetate butyrate. |
What is the appearance of a blushing paint finish? | Chalky or cloudy. |
What finishing effect is the result of a paint room temperature that is too warm? | Pinholes or blisters. |
What causes dope to blush? | High humidity, moisture in the spray system, or application over a damp surface. |
What factors cause spray paint sags and runs? | Inadequate surface preparation or paint sprayed onto thickly. |
What components or parts of the airframe must be protected from damage when using paint stripper? | Windshields and windows, Plastics, Composites, synthetic Rubber, and fabrics. |
What is the function of zinc-chromate or wash primers? | Primers serve to inhibit corrosion and provide a good bond between the metal and the top coats. |
Name several common types of paint used on aircraft. | Zinc-chromate and wash primers, synthetic enamel, acrylic lacquer, and polyurethane. |
What is the proper thinner to use with zinc-chromate primer? | Toluene. |
What health and safety precautions must be observed when using the toxic solvents and thinners that are part of modern finishing systems? | Respirators and/or mask must be worn when spraying finishes. |
If spray painting dust causes a surface to appear dry and rough, what are the most likely causes? | Too much air pressure or the spray gun is too far from the surface being painted. |
What causes "orange-peel"? | Spray pressure too high, use of a thinner that dries too fast, cold temperatures, or a damp draft over the surface. |
What regulation governs the application of the registration numbers to aircraft registered in the United States? | Far part 45. |
Other than appearance, what is another reason for touching up painted surfaces? | Reduction or elimination of General corrosion problems. |
What references should be used to determine if a control surface must be checked and/or balanced after painting? | The manufacturer's service manual. |
What would be the effect if dope was used over paint or enamel? | The dope tends to dissolve these materials. |
What are the three most commonly used methods of applying paint? | Dipping, brushing, and spraying. |
What is the effect on paint finishes if too much drier is added to the paint? | The paint film will be brittle and tend to crack and peel. |
What paint system(s) may be used with epoxy topcoats? | Any paint system in good condition. |