MIL-HDBK-1110
6.6
Recommendations for Paint Removal. It is often
necessary to remove old coatings that are peeling, checking,
cracking, or the like. General recommendations for removal of
paint from a variety of substrates are made in Table 8. More
specific information is provided in par. 6.7.
Table 8
Procedures for Coating Removal
(IMPORTANT NOTE - Presence of Leaded Paint Will Require
Environmental and Worker Safety Controls)
Substrate
Methods
Wood
Chemical removers; heat guns or hot plates
along with scraping; power sanding (must be
done with caution to avoid damaging wood).
Masonry
Careful water blasting to avoid substrate
damage; brush-off blasting and power tools,
used with caution.
Steel
Abrasive blasting; water blasting.
Miscellaneous
Chemicals; brush-off blast; water blast
metals
6.7
Methods of Surface Preparation. Information on surface
preparation methods and procedures are presented to help select
appropriate general procedures and to inspect surface preparation
jobs. It is not intended to be a complete source of information
for those doing the work.
6.7.1
Abrasive Blasting. Abrasive blast cleaning is most
often associated with cleaning painted and unpainted steel. It
may also be used with care to prepare concrete and masonry
surfaces and to clean and roughen existing coatings for painting.
Abrasive blasting is an impact cleaning method. High-velocity
abrasive particles driven by air, water, or centrifugal force
impact the surface to remove rust, mill scale, and old paint from
the surfaces. Abrasive cleaning does not remove oil or grease.
If the surface to be abrasive blasted is painted with leaded
paint, additional controls must be employed to minimize hazards
to workers and the surrounding environment. Leaded paint issues
are discussed in more detail in Section 3.
There are four degrees of cleanliness of blast cleaning
designated by the SSPC and the NACE for steel substrates. These
designations are white metal, near-white metal, commercial, and
brush-off. They are described in detail in par. 6.5.1.1. The
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