Millions of items ranging from cars to candy are covered by paint, plastic, varnish, chocolate, or some other type of coating solution. Painting or coating is used to make a product more attractive or protect it from the elements. The paint finish on an automobile, for example, makes the vehicle more attractive and provides protection from corrosion. Achieving this end result is the work of painting and coating workers.
Before painting and coating workers can begin to apply the paint or other coating, they often need to prepare the surface. A metal, wood, or plastic part may need to be sanded or ground to correct imperfections or rough up a surface so that paint will stick to it. After preparing the surface, the product is carefully cleaned to prevent any dust or dirt from becoming trapped under the paint. Metal parts are often washed or dipped in chemical baths to prepare the surface for painting and protect against corrosion. If the product has more than one color or has unpainted parts, masking is required. Masking normally involves carefully covering portions of the product with tape and paper.
After the product is prepared for painting, coating, or varnishing, a number of techniques may be used to apply the paint. Perhaps the most straightforward technique is simply dipping an item in a large vat of paint or other coating. This is the technique used by dippers, who immerse racks or baskets of articles in vats of paint, liquid plastic, or other solutions by means of a power hoist.
Spraying products with a solution of paint or some other coating is also quite common. Spray machine operators use spray guns to coat metal, wood, ceramic, fabric, paper, and food products with paint and other coating solutions. Following a formula, operators fill the machine's tanks with a mixture of paints or chemicals, adding prescribed amounts of solution. Then they adjust nozzles on the spray guns to obtain the proper dispersion of the spray, and they hold or position the guns so as to direct the spray onto the article. Operators also check the flow and viscosity of the paint or solution and visually inspect the quality of the coating. When products are drying, these workers often must regulate the temperature and air circulation in drying ovens.
Some factories use automated painting systems that are operated by coating, painting, and spraying machine setters, operators, and tenders. When setting up the systems, operators position the automatic spray guns, set the nozzles, and synchronize the action of the guns with the speed of the conveyor carrying articles through the machine and drying ovens. The operator also may add solvents or water to the paint vessel to prepare the paint for application. During the operation of the painting machines, these workers tend the equipment, observe gauges on the control panel, and check articles for evidence of any variation from specifications. The operator uses a manual spray gun to "touch up" flaws.
Powder coating is another common technique for painting manufactured goods. Powder coating machines achieve a smooth finish on metal objects. Workers oversee machines that electrically charge the metal object so that it acts like a magnet. The object enters a powder room filled with powdered paint that is attracted to the magnetic object. After being covered in the powder, the object is baked in an oven where the paint melts into a smooth paint finish.
Individuals who paint, coat, or decorate articles such as furniture, glass, pottery, toys, cakes, and books are known as painting, coating, and decorating workers. Some workers coat confectionery, bakery, and other food products with melted chocolate, cheese, oils, sugar, or other substances. Paper is often coated to give it its gloss or finish and silver, tin, and copper solutions are often sprayed on glass to make mirrors.
The best known group of painting and coating workers are those who refinish old or damaged cars, trucks, and buses in automotive body repair and paint shops. Transportation equipment painters, also called automotive painters, who work in repair shops are among the most highly skilled manual spray operators because they perform intricate, detailed work and mix paints to match the original color, a task that is especially difficult if the color has faded. The preparation work on an old car is similar to painting other metal objects. The paint is normally applied with a manually controlled spray gun.
Transportation equipment painters who work on new cars oversee several automated steps. A modern car is first dipped in an anti-corrosion bath, then painted with the color of the car, and then painted in several coats of clear paint. The clear paint prevents scratches from damaging the colored paint on the car.
Most other transportation equipment painters either paint equipment too large to paint automatically—such as ships or giant construction equipment—or perform touch-up work to repair flaws in the paint caused either by damage during assembly or flaws during the automated painting process.
Whatever object is being painted and in whatever method, the painting process is often repeated several times to achieve a thick, smooth, protective coverage.
Work environment. Painting and coating workers typically work indoors and may be exposed to dangerous fumes from paint and coating solutions, although in general, workers' exposure to hazardous chemicals has decreased because of regulations limiting emissions of volatile organic compounds and other hazardous air pollutants. Painting usually is done in special ventilated booths with workers typically wearing masks or respirators that cover their noses and mouths. More sophisticated paint booths and fresh-air systems are increasingly used to provide a safer work environment.
Operators have to stand for long periods, and when using a spray gun, they may have to bend, stoop, or crouch in uncomfortable positions to reach different parts of the article. Some painters work suspended from ropes to reach high places.
Most painting and coating workers work a normal 40-hour week, but automotive painters in repair shops can work more than 50 hours a week, depending on the number of vehicles that need repainting.
| 1. | Apply coatings, such as paint, ink, or lacquer, to protect or decorate workpiece surfaces, using spray guns, pens, or brushes. |
| 2. | Examine finished surfaces of workpieces to verify conformance to specifications; then retouch any defective areas. |
| 3. | Clean and maintain tools and equipment, using solvents, brushes, and rags. |
| 4. | Read job orders and inspect workpieces to determine work procedures and materials required. |
| 5. | Clean surfaces of workpieces in preparation for coating, using cleaning fluids, solvents, brushes, scrapers, steam, sandpaper, or cloth. |
| 6. | Rinse, drain, or wipe coated workpieces to remove excess coating material or to facilitate setting of finish coats on workpieces. |
| 7. | Place coated workpieces in ovens or dryers for specified times in order to dry or harden finishes. |
| 8. | Select and mix ingredients to prepare coating substances according to specifications, using paddles or mechanical mixers. |
| 9. | Melt or heat coating materials to specified temperatures. |
| 10. | Conceal blemishes in workpieces, such as nicks and dents, using fillers such as putty. |
| 11. | Immerse workpieces into coating materials for specified times. |
| 12. | Cut out sections in surfaces of materials to be inlaid with decorative pieces, using patterns and knives or scissors. |
| 13. | Position and glue decorative pieces in cutout sections of workpieces, following patterns. |
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