Skip to main content

Historic Preservation - Technical Procedures

Spectitle:

Applying Paste Wax Over "Incralac" Coated Bronze

Procedure code:

0501005P

Source:

Outdoor Sculpture Manual - Center For Public Buildings

Division:

Metals

Section:

Metal Materials

Last Modified:

07/01/2013

Details:

Applying Paste Wax Over "Incralac" Coated Bronze



APPLYING PASTE WAX OVER INCRALAC COATED BRONZE


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance on applying a paste wax
         to outdoor bronze metal currently coated with Incralac or
         similar acrylic resin coating.  The bronze may be either
         architectural components or sculpture.

    B.   Paste wax helps to prolong the life of the coating.
         Discolorations in the bronze may be disguised by adding
         a pigment to the wax.

    C.   Wax annually (if exposure is severe, semi-annually.)

    D.   For general information on the characteristics, uses and
         problems associated with bronze, see 05010-03-S.


PART 2---PRODUCTS

2.01 MANUFACTURERS

    A.   Fisher Scientific Co.
         www.fishersci.com

2.02 MATERIALS

    NOTE:  Chemical products are sometimes sold under a common
    name.  This usually means that the substance is not as pure as
    the same chemical sold under its chemical name.  The grade of
    purity of common name substances, however, is usually adequate
    for stain removal work, and these products should be purchased
    when available, as they tend to be less expensive.  Common
    names are indicated below by an asterisk (*).

    A.   Hog bristle stencil brushes, 2-inch diameter, 1-3/4 inch
         bristle length, such as No. 996 in Industrial Soap
         Catalog

    B.   Clear white paste wax, such as Trewax clear, Butcher's
         bowling alley wax, or approved equal.  Trewax clear and
         Butcher's bowling alley wax are mixtures of
         microcrystalline wax, carnauba and a mild solvent, in
         paste form.

         CAUTION:  DO NOT USE CAR WAX, SIMONIZE OR OTHER EMULSION-
         TYPE WAXES.

    C.   Powdered pigment, burnt umber and black

    D.   Mineral spirits:

         1.   A petroleum distillate that is used especially as a
              paint or varnish thinner.

         2.   Other chemical or common names include Benzine*
              (not Benzene); Naphtha*; Petroleum spirits*;
              Solvent naphtha*.

         3.   Potential Hazards:  TOXIC AND FLAMMABLE.

         4.   Safety Precautions:

              a.   AVOID REPEATED OR PROLONGED SKIN CONTACT.

              b.   ALWAYS wear rubber gloves when handling
                   mineral spirits.

              c.   If any chemical is splashed onto the skin,
                   wash immediately with soap and water.

         5.   Available from construction specialties
              distributor, hardware store, paint store, or
              printer's supply distributor.

         -OR-

         Turpentine

    E.   Gloves, disposable polyethylene or neoprene rubber (may
         be ordered from Fisher Scientific Co.).  Disposable
         surgical gloves may also be used, but they are vulnerable
         to organic solvents.

    F.   Clean, potable water

2.02 EQUIPMENT

    A.   Small quart-size, galvanized metal pail or other clean
         container

    B.   Spoon, and/or palette knife or spatula

    C.   Rags, soft, clean and lint-free


PART 3---EXECUTION

3.01 ERECTION, INSTALLATION, APPLICATION

    A.   Place approximately six ounces of paste wax into the
         pail.  Add about an equal amount of thinner (mineral
         spirits or turpentine).  If pigment is necessary, add
         either umber, black or an appropriate mixture of the two
         to give sufficient color to the mix.

    B.   Mix and blend well using the spatula and the brush,
         adding more thinner if necessary to produce a thick
         creamy consistency (about the consistency of a thick
         soup).  As the thinner evaporates, add more as necessary
         to maintain a workable mix.

    C.   Apply the wax mixture thinly using the ends of the brush
         hairs to work the mixture into the depths of forms and
         textures.  To apply the wax, use a perpendicular striking
         motion with the brush rather than a stroking motion.  Be
         careful not to scratch the coating with the metal ferrule
         of the brush.

    D.   When the solvent has evaporated, rub and polish the
         surface with a clean cloth.  A thin, polished coating of
         wax will remain.  If pigmented wax is used it can be
         selectively removed according to the requirements of the
         bronze.

                         END OF SECTION
 


paste wax, Incralac, outdoor bronze, Trewax, Butcher's, microcystalline wax