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Historic Preservation - Technical Procedures

Spectitle:

General Cleaning Of Painted Or Waxed Wood Surfaces

Procedure code:

0620001P

Source:

Hspg Prepared For Nps - Sero

Division:

Wood And Plastics

Section:

Finish Carpentry

Last Modified:

02/24/2012

Details:

General Cleaning Of Painted Or Waxed Wood Surfaces



GENERAL CLEANING OF PAINTED OR WAXED WOOD SURFACES


PART 1---GENERAL

1.01 SUMMARY

    A.   This procedure includes guidance for periodically
         cleaning painted or waxed wood surfaces.

    B.   See 01100-07-S for general project guidelines to be
         reviewed along with this procedure.  These guidelines
         cover the following sections:

         1.   Safety Precautions

         2.   Historic Structures Precautions

         3.   Submittals

         4.   Quality Assurance

         5.   Delivery, Storage and Handling

         6.   Project/Site Conditions

         7.   Sequencing and Scheduling

         8.   General Protection (Surface and Surrounding)

         These guidelines should be reviewed prior to performing
         this procedure and should be followed, when applicable,
         along with recommendations from the Regional Historic
         Preservation Officer (RHPO).

    C.   For guidance on refinishing wood surfaces, see 06400-10-R.


PART 2---PRODUCTS

2.01 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.   Non-Ionic detergent such as "Joy" or "Ivory Liquid", or
         trisodium phosphate (TSP)

         1.   Trisodium Phosphate:

              NOTE:  THIS CHEMICAL IS BANNED IN SOME STATES SUCH
              AS CALIFORNIA.  REGULATORY INFORMATION AS WELL AS
              ALTERNATIVE OR EQUIVALENT CHEMICALS MAY BE
              REQUESTED FROM THE ENVIRONMENTAL PROTECTION AGENCY
              (EPA) REGIONAL OFFICE AND/OR THE STATE OFFICE OF
              ENVIRONMENTAL QUALITY.

              a.   Strong base-type powdered cleaning material
                   sold under brand names.

              b.   Other chemical or common names include Sodium
                   Orthophosphate; Tribasic sodium phosphate;
                   Trisodium orthophosphate; TSP*; Phosphate of
                   soda*; (also sold under brand names such as).

              c.   Potential Hazards:  CORROSIVE TO FLESH.

              d.   Available from chemical supply house, grocery
                   store or supermarket or hardware store.

    B.   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:  Available from hardware store or paint
         store.

         -OR-

         Denatured Alcohol:

         1.   Other chemical or common names include Methylated
              spirit*.

         2.   Potential hazards:  TOXIC AND FLAMMABLE.

         3.   Available from hardware store, paint store or
              printer's supply distributor.

         4.   Denatured alcohol should be a satisfactory
              substitute for ethyl alcohol for stain removing
              purposes.

    C.   Paste wax

    D.   Liquid bleach

    E.   Clean, potable water

2.02 EQUIPMENT

    A.   000 steel wool

    B.   Two buckets (solution and rinse)

    C.   Two sponges (solution and rinse)

    D.   Supply of soft dry wiping cloths

    E.   Ladder

    F.   Drop cloth

    G.   16" electric floor machine

    H.   Lamb's wool buffing pads


PART 3---EXECUTION

3.01 PREPARATION

    A.   Protection:  

         1.   Cover all surfaces and equipment not to be cleaned.
              Coverings must be adhered without adhesive tape or
              nails.  Impervious sheeting that produces
              condensation shall not be used.

         2.   Make sure work area is well ventilated and wear
              protective clothing and rubber gloves.

         3.   When cleaning, always rub along the grain of the
              wood.

         4.   Change cloths as often as necessary to be effective
              in cleaning.

    B.   Surface Preparation:  Thoroughly dust and/or vacuum
         surfaces before washing.

3.02 ERECTION, INSTALLATION, APPLICATION

    A.   Cleaning Painted Wood Surfaces:

         1.   To clean spots, rub area gently with a clean, damp
              sponge and dry with a clean wiping cloth.  

         2.   If water alone will not remove spot, use a non-
              ionic detergent or TSP solution as described below,
              rinse thoroughly, and wipe dry.  If this cleaning
              procedure leaves a noticeable difference between
              treated and untreated areas, cleaning is not being
              performed properly or frequently enough.

              a.   Wash dirt and grease using a solution of 3
                   quarts warm water mixed with 2/3 cup trisodium
                   phosphate (TSP) and non-ammoniated detergent.
                   If mildew is a problem add 1 quart of liquid
                   bleach.

              b.   Start at a lower corner of room, moisten 5 to
                   10 square feet of surface, then scrub with a
                   medium bristle brush to remove dirt.
                   Thoroughly rinse surface, two rinses may be
                   required, and wipe dry with clean wiping
                   cloth.

              c.   Continue process on lower portion of walls
                   around entire room, slightly overlapping
                   preceding section.  ALWAYS WASH THE LOWER
                   PORTION FIRST BECAUSE SOLUTION STREAKS RUNNING
                   DOWN A DIRTY WALL CANNOT BE REMOVED.  Proceed
                   to wash upper wall surfaces and ceiling,
                   including any painted wood ornament, from
                   ladder.

    B.   Cleaning Waxed Wood Surfaces:

         NOTE:  WAX IS AN IMPORTANT MAINTENANCE AGENT WHICH
         PROTECTS AGAINST MATERIAL ABRASION AND WETTING.  ITS
         ADVANTAGE IS THAT IT IS EASY TO APPLY AND EASY TO REMOVE.
         IT CAN BE RECONDITIONED WITHOUT STRIPPING BY APPLYING
         MORE WAX AND REBUFFING.  THE SOLVENT IN THE WAX
         RECONDITIONS THE PREVIOUS COAT AND MINIMIZES BUILD-UP.  

         1.   For walls:

              a.   Follow the above wall washing techniques, but
                   keep the surface as dry as possible.  Cleaning
                   solution should contain only non-ionic
                   detergent and water.

              b.   Working in a well-ventilated area, remove
                   paste wax by rubbing hard with a coarse cloth
                   soaked in turpentine.  

              c.   Remove stubborn dirt spots by scrubbing
                   lightly with 000 steel wool.  Change cloth or
                   steel wool when they become clogged with old
                   wax.

              d.   Apply wax with a clean, soft cloth.  Waxing
                   unpainted wood surfaces is imperative for
                   protection from moisture and abrasion.  Use a
                   paste or microcrystalline wax that is
                   removable by water or turpentine.

              e.   Place a small amount on the cloth and wipe it
                   over surface leaving a thin, even coating.
                   Wipe off any stray wax grains.  

              f.   Buff wax before it hardens.  

                   NOTE:  Paste wax can be reconditioned by
                   applying more wax and rebuffing.  The solvent
                   in the paste wax reconditions previous coats
                   and minimizes build-up.

         2.   For floors:

              NOTE:  BE SURE THE WAX IS DESIGNATED FOR USE ON
              HARDWOOD FLOORS.  DO NOT USE A LIQUID WAX WITH A
              WATER-BASE (I.E. FUTURE).  NATIONAL OAK FLOORING
              MANUFACTURERS ASSOCIATION (NOFMA) RECOMMENDS USING
              ONLY A SOLVENT-BASE PRODUCT.

              a.   Place a small amount of wax on dampened,
                   clean, soft cloth and wipe it over the floor
                   leaving a thin and even coating.  It is not
                   necessary to go right to the baseboards
                   because the buffing operation will spread the
                   wax to the edges of the room in every place
                   except the inside corners.  

              b.   Buff floor using a 16" electric floor machine
                   and lamb's wool pads.  Reverse or replace pads
                   as they become dirty.  Buff to high gloss.

                   NOTE:  TAKE CARE NOT TO DAMAGE ADJACENT
                   SURFACES.

              c.   After polishing, sweep the floor to pick up
                   stray wax grains that are loose on the floor.
                   Wash all equipment before the wax hardens.  

3.03 ADJUSTING/CLEANING

    A.   BOTH PASTE WAX AND TURPENTINE ARE FLAMMABLE, DISPOSE OF
         USED CLOTHS PROPERLY IN A METAL SAFETY CONTAINER TO GUARD
         AGAINST SPONTANEOUS COMBUSTION.

                         END OF SECTION