PAINT

Basic Military Requirements (BMR) Revised Edition
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Scaling is done by using either tool shown in figure 18-2. A chisel is used with the pneumatic hammer and must be held so that the chisel strikes the surface at approximately a 45º angle. As with the hand scaling hammer, take care that you don’t dent the surface. The rotary scaling and chipping tool shown in figure 18-2 (called a deck crawler) has a bundle of cutters or chippers mounted on either side. As it is pushed along the surface to be scaled, the rotating cutters do the work. This tool is particularly helpful on large deck areas. The electric disk sander is another useful tool for preparing surfaces. However, it must be used with care. If too much pressure is applied or it is allowed to rest in one place too long, it will quickly cut into the surface, particularly wood and aluminum surfaces. POWER TOOL SAFETY PRECAUTIONS.— You must be trained and qualified before you operate portable power tools. You must observe the following safety precautions when working with electrical and pneumatic (air) tools: Wear eye and ear protection while chipping, grinding, sanding, or wire brushing. If dust is excessive, also wear a respirator. Do not wear jewelry or loose fitting clothing. Do not use defective tools. If you have any doubt about the condition of any tool, show it to your supervisor, who will have its condition determined. Make certain that electrical power tools are grounded properly. Every portable electrical power tool must be provided with a ground lead that connects the tool casing to the ship’s structure and an up-to-date electrical safety tag. Give your full attention to your job. Give electricity the respect it is due—115 volts can and does kill. Do not operate power tools in areas where flammable vapors, gases, liquids, or exposed explosives are present. Do not allow power cords and air hoses to kink or come in contact with oil, grease, hot surfaces, or sharp objects. Do not lay power cords and air hoses over ladders, steps, scaffolds, or walkways in such a manner as to cause a trip hazard. Do not use compressed air to clean clothing being worn or to blow dust off the body. PAINT Paint consists of four essential ingredients: Pigment Vehicle (known as the base) Drier Thinner Pigment provides the coloring, rust prevention (in primers), and the lasting quality of the paint. The most common pigments are made of metals, such as lead, zinc, or titanium. 18-12 Student Notes: Figure 18-1.—Portable grinder and wire brush. Figure 18-2.—Power scaling tools.

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