Shop Quiz: Paint, Finishes, and Primers

2025 shop rivas

THREE GENERAL CLASSES

Protective, Appearance, decorative

Protective class

Internal and unexposed parts

Protection from deterioration

Appearance

Exposed Parts

Decorative

Trim striping, decals and identification numbers and letters

Paint

Affects weight, protect airframe, prevent corrosion, prevent deterioration, easier to clean and maintain.

Dope

Fabric-covered aircraft ruled the sky

Synthetic enamel

Oil-based single-stage paint durability and protection

Polyurethane

Abrasion-stain and chemical resistant properties

Acetone

Fast evaporating colorless solvent

Acetone in paint removes

nail polish and varnish, grease from fabric

Alcohol butanol

slow-drying aircraft dope on humid days to prevent blushing

Benzene

Highly flammable, colorless liquid, sweet odor

MEK

2-butanone, highly flammable, liquid solvent to clean paint and varnish, extracts oil

Naphtha

Volatile hydrocarbon mixtures, petroleum based

All paint booths

adequate ventilation system: remove toxic air, no overspray and dust

Electric motors should be grounded and enclosed to

eliminate sparks

If dizzy or nauseous

leave area and seek fresh air and assistance

if Pregnant

OSHa requires person to be protected from vapors and other hazards.

Class A

wood

Class B

petrol, diesel, oils

Class C

Electrical

Class D

Metals

Finishing materials

Acetone, alcohol, thinners

Alcohol butyl prevents

dope blushing

Alcohol butyl and ethyl dilute

wash coat primer

Alcohol denatures

Paint and varnish remover

Alcohol isopropyl cleans

oxygen systems

Thinners are used

dopes, enamels, and paints and thinned for spray guns, brushing

Paint thinners add to

oil-based paint, stain varnish and polyurethane to make application easier and smooth the appearance of coating.

Paint thinners eliminate

Brush marks, improve leveling, increase penetration of coating

Paint thinner allows

paint to go on easier and with less brush drag

Examples of paint

Primers, wash primers, red iron oxide, gray enamel undercoat, zinc chromate

Identification of paint

Dope, synthetic enamel, polyurethane, urethane coating

Primers

It is invisible after topcoat finish is applied, foundation of finish

wash primers

water thin coating of phosphoric acid in vinyl butyral resin, alcohol, or others

Red iron oxide

Alkyd resin based coating for use over iron and steel in mild environmental conditions

Gray enamel undercoat

single component, non-sanding primer with wide variety of topcoats

Zinc chromate

corrosion-resistant pigment made of different resin, add to primers, add to metal, old= yellow, new=green, thinned with toluene, dope proof paint

Dope

Standard finish to protect and color fabric

Synthetic enamel

Oil-based single-stage paint=durability and protection

Polyurethane

top of list for abrasion, stain, chemical resistant properties

Urethane coating

certain types of binders used for paints and clear coating

Wash primers two part system

resin and alcoholic phosphoric acid, mix slow for 30 mins within 4 hrs

wash primers need moisture to

convert phosphoric acid to protective film

Wash primers thin

butyl resin and ethyl alcohol

Epoxy

thermosetting resin for tough, hard, chemical-resistant, adhesives

Spray gun amount of psi

40-50

paint problems:

Blushing, poor adhesion, orange peeling, pinholes, grease, dirt

14 CFR 45

Identification and registration marking

Size req

12 inch high, glider at least 3 inches high

Decal stuff

fuel, oil, tank, identify lifting and leveling, walkways, battery locations specifications

Paper

Immerse in water 1-3 min

Less than 1 min

backing no separate from it

over 3 min

backing separate from decal while immersed

Metal decal with paper backings are applied similarly to those having

cellophane backing

metal decals may be peeled

from decal without moistening

Remove paper decal by

rubbing decal with cloth dampened with lacquer thinner

Decal applied over painted or doped surfaces

use lacquer thinner sparingly prevent removing paint or dope

Skinning

Film of dry paint

Applying paint methods

dipping, brushing, spraying (can & gun)