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 (4) Paint Systems. Waterjetting is not compatible with epoxy-polyamide paint systems. Therefore,
surfaces cleaned by waterjetting shall be coated with one of the alternatively approved epoxy paint
system listed in Appendix B.
WARNING
Vapor
Although nonflammable paint strippers and removers eliminate fire hazards, they are toxic and
can be hazardous to personnel.
a. Paint Remover Uses. Removers are available in flammable and nonflammable types and as a liquid
or semi-paste. While most paint removers require scraping or use of steel wool to physically remove the
softened paint, types of paint removers are available that allow the loosened finish to be flushed off with
steam or hot water. Many of the flammable and nonflammable removers contain paraffin wax to retard
evaporation. It is essential that any wax residue be removed from the surface prior to painting to prevent
loss of adhesion of the applied coating. In such instances, follow the manufacturer's label directions or
use mineral spirits to remove any wax residue.
b. Paint Removers Safety Precautions. Safety precautions and special requirements, such as proper
ventilation, which shall be observed when working with these substances, are described in paragraph 2-
a. The steam cleaning method of preparing surfaces for painting involves using steam or hot water
under pressure. Steam cleaning compound can be included for added effectiveness. The steam or hot
water removes oil and grease by liquefying these contaminants (because of the high temperature), then
emulsifying and diluting them with water. When steam cleaning is used on some types of old paint, the
old paint becomes swollen and loosened. Steam cleaning is commonly used to remove heavy dirt
deposits, soot, and grime. Wire brushing or brush-off blast cleaning may be necessary to complete the
residue removal.
b. The workman should be provided with proper head cover, a face shield, a heavy rubber apron, oilskin
or rubber trousers, knee-length boots drawn under the trouser legs, a heavy rubber coat, and rubber
gloves covering canvas gloves. If the air temperature is excessive causing the worker to suffer
excessively from heat, equipment could be limited to knee boots worn under the trousers, an oiled (or
plastic) apron, gloves, and face shield. During steam cleaning operations, adequate ventilation, natural or
forced, should be provided.
rust preventive compound where large surface areas are involved, or where the rust preventive
compound hardened with age. For small areas, it can be effectively removed with an aromatic
hydrocarbon solvent of petroleum naphtha or coal tar naphtha.
remove any mixture of grade one thin-film rust preventive compound and metal conditioning compound. If
straight steam is not an effective removal method, the procedures described in the paragraphs below are
recommended. Health hazards are described in paragraph 2-17, Health Hazards and Personnel
Exposure Limit Values for Certain Paint Ingredients.
a. Naphtha-Rosin Soap. Mix Hercules Powder Dresinate 87 (a liquid sodium rosin soap) and high-flash
coal tar naphtha in 1:2 weight ratios. Stir until a homogenous mixture is obtained. Brush this cleaning
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