Technical Procedures Disclaimer
Prior to inclusion in GSA’s library of procedures, documents are reviewed by one or more qualified preservation specialists for general consistency with the Secretary of Interior Standards for rehabilitating historic buildings as understood at the time the procedure is added to the library. All specifications require project-specific editing and professional judgement regarding the applicability of a procedure to a particular building, project or location. References to products and suppliers are to serve as a general guideline and do not constitute a federal endorsement or determination that a product or method is the best or most current alternative, remains available, or is compliant with current environmental regulations and safety standards. The library of procedures is intended to serve as a resource, not a substitute, for specification development by a qualified preservation professional.
We’ve reviewed these procedures for general consistency with federal standards for rehabilitating historic buildings and provide them only as a reference. Specifications should only be applied under the guidance of a qualified preservation professional who can assess the applicability of a procedure to a particular building, project or location. References to products and suppliers serve as general guidelines and do not constitute a federal endorsement nor a determination that a product or method is the best alternative or compliant with current environmental regulations and safety standards.
- This procedure includes guidance on filling minor holes in wood veneer paneling such as those caused by the removal of picture nails or electrical conduit.
- See 01100-07-S for general project guidelines to be reviewed along with this procedure. These guidelines cover the following sections:
- Safety Precautions
- Historic Structures Precautions
- Quality Assurance
- Delivery, Storage and Handling
- Project/Site Conditions
- Sequencing and Scheduling
- 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).
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 (*).
- Wood Filler: Paste wood filler shall be blended silica in aromatic mineral spirits solvent with an alkyd resin base, color as required to match original stain, such as (Mohawk Finishing, Inc.), or approved equal.
NOTE: USE OF WOOD FILLER WITH LINSEED OIL VEHICLE MAY CAUSE WHITE SPOTS IN LACQUER FINISH COAT OR INHIBIT ITS PROPER DRYING.
- Sanding Sealer: Lacquer based sanding sealer, formulated for brushing, composed of products compatible with veneer, such as (Mohawk Finishing, Inc.), or approved equal.
- Surfacing Putty: Duratite or approved equal
- Benzene (C6H6):
- A colorless, volatile, flammable, toxic, liquid, aromatic hydrocarbon used in organic synthesis, as a solvent and as a motor fuel.
- Other chemical or common names include Benzol; Benzole; Phene; Phenyl hydride; Coal naphtha*; Motor benzol*.
- Potential Hazards: FLAMMABLE.
- Available from automotive supply distributor, chemical supply house, dry cleaning supply distributor, hardware store or paint store.
- Benzene and benzine should not be confused. Benzene is a distinct chemical compound obtained from coal tar. Benzine is a mixture of aromatic hydrocarbons of similar boiling points derived from petroleum.
- Steel wool (0000)
- Cloths: Soft, clean, and lint free
- Clean, potable water
- Soft, Natural Bristle Brush
- Protection: All surfaces adjacent to wood being repaired shall be protected during cleaning and the surface restoration process. All damaged items shall be corrected by the Contractor at no expense to the Government.
- Surface Preparation:
- Gently clean surface to be repaired. See 06400-01- R for guidance on the periodic maintenance of wood veneer paneling.
- Lightly sand deteriorated finishes.
- Make sure that all wood surfaces are clean and smooth.
- Fill all gouges and scratches with compatible surface putty color matched to stain. Sand smooth.
- Re-adhere small areas of delaminated veneer using a polyvinyl acetate (PVA) glue.
3.02 ERECTION, INSTALLATION, APPLICATION
- Thin wood filler to a consistency of heavy cream with benzene.
- Apply filler with a brush.
- After it has uniformly turned to a dull appearance, remove all traces with a burlap rag wiped across the grain.
- Allow surface to dry at least 24 hours.
- Rub with 0000 steel wool and wipe with a tack rag.
- Apply one coat of sanding sealer.
- Wipe woodwork with soft cloth dampened with clear water.
- Promptly wipe dry, rubbing in direction of grain.
- Polish by dry-rubbing with soft, dry cloth.