Removing Dirt Build-Up On Ornamental Metal
- Procedure code:
- National Capitol Region Specification - Old Executive Off
- Ornamental Metalwork
- Last Modified:
REMOVING DIRT BUILDUP ON ORNAMENTAL METAL
A. This procedure includes guidance on cleaning and
polishing unpainted ornamental metal surfaces and
applying a new clear finish.
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
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).
1.02 QUALITY ASSURANCE
A. Mock-ups: Demonstrate materials and methods to be used
for cleaning, paint stripping, and polishing for each
type of ornamental metal surface and condition on sample
panels of approximately 9 square feet in area. Test
adjacent non-metallic materials for possible reaction
with cleaning and paint stripping materials.
1.03 PROJECT/SITE CONDITIONS
A. Protect surrounding surfaces of building from damage
resulting from ornamental metal restoration work.
B. Prevent chemical cleaning and paint stripping solutions
from coming into contact with other surfaces which could
be inured by such contact.
C. Dispose of by-products from cleaning and paint stripping
operations by legal means and in manner which prevents
damage to other surfaces.
A. ProSoCo, Inc.
755 Minnesota Avenue
P.O. Box 1578
Kansas City, KS 66117
800/255-4255 or 913/281-2700
A. Chemical Cleaner: Manufacturer's standard strength
acidic ornamental metal restoration cleaner, such as
"Sure Klean 887 Stainless Steel Cleaner," (ProSoCo,
Inc.), or approved equal.
B. Protective Lacquer: Clear non-yellowing for protection of
the finished metal surface.
C. Water for Cleaning: Clean, potable, free of oils, acids,
alkalis, salts, and organic matter.
D. Cleaning Pads: No. 4/0 fine steel wool or synthetic pads.
A. Brushes: Fiber bristle only.
1. Comply with recommendations of manufacturers of
chemical cleaners and paint removers for protecting
building surfaces from exposure to their products.
2. Protect glass, unpainted metal trim and polished
stone from contact with acidic chemical cleaners by
covering them with liquid strippable masking agent
or polyethylene film and waterproof masking tape.
Apply masking agent to comply with manufacturer's
recommendations. Do not apply liquid masking agent
to adjacent painted or porous surfaces, use
waterproof masking tape.
3. Protect unpainted metal from contact with alkali
chemical cleaners by covering them either with
liquid strippable masking agent or polyethylene
film and waterproof masking tape.
4. Remove cellophane tape, masking tape, etc., from
ornamental metal surface prior to cleaning.
3.02 ERECTION, INSTALLATION, APPLICATION
A. Brush apply chemical cleaner to ornamental metal surfaces
in the concentration recommended by the manufacturer.
B. Agitate surface with either steel wool or synthetic
cleaning pad. Follow direction of grain in metal. Do not
scratch or abrade surface.
C. Thoroughly sponge or cloth rinse surface with clean water
to remove chemical cleaner and loosened dirt.
D. Machine or hand polish metal where indicated with buffing
wheel or soft cloth using polishing compound typically
recommended as standard industry practice and as approved
by the RHPO.
E. Repeat process as required to produce desired effect.
F. Wipe surface completely dry with clean soft cloths. Do
not touch cleaned ornamental metal surfaces.
G. Immediately apply two coats of protective lacquer finish
END OF SECTION