What causes dope to blush?

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Airframe Ch6

Aircraft Painting

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 and cloudy
What finishing defect is the result of a paint room temperature that is too warm?	Pinholes or blisters
What causes dope to blush?	High humidity, moistre in the spray system, or application over a damp surface.
What factors cause spray paint sags and runs?	Inadequate surface preparation or paint sprayed on too 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 topcoats.
Name several common types of paints used on aircrafts	Zinc-chromate and wash primers, synthetic enamels, 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 hinners that are part of modern finishing systerms	Respirators and/or masks 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 rebalanced 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 crackand peel.
What paint system(s) may be used with epoxy topcoats?	Any paint system in good condition.

Created by: leimana1

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