Removing Graffiti From "Incralac" Coated Bronze
- Procedure code:
- Outdoor Sculpture Manual - Center For Public Buildings
- Metal Materials
- Last Modified:
REMOVING GRAFFITI FROM "INCRALA= C" COATED BRONZE
THE CLEANING OR STRIPPING OF METALS MAY INVOLVE THE USE OF
ABRASIVES, LIQUIDS OR SOLVENTS WHICH MAY SPLASH OR RUN OFF ONTO
ADJACENT MATERIALS. TAKE SPECIAL CARE TO PROTECT ALL ADJACENT
MATERIALS, AND DO NOT USE THIS PROCEDURE ON METALS OTHER THAN
THOSE SPECIFIED IN THE SUMMARY.
A. This procedure includes guidance on removing ink or paint
based graffiti from "Incralac" coated bronze using a
solvent. If this protective coating is removed in the
process, it may be reapplied (see 05010-= 11-R "Repairing
a Scratched or Worn Incralac Coating on Bronze").
B. Safety Precautions:
1. DO NOT save unused portions of stain-removal
2. DO NOT store any chemicals in unmarked containers.
3. EXCELLENT VENTILATION MUST BE PROVIDED WHEREVER ANY
SOLVENT IS USED. USE RESPIRATORS WITH SOLVENT
4. No use of organic solvents indoors should be
allowed without substanti= al air movement. Use only
spark-proof fans near operations involving
5. Provide adequate clothing and protective gear where
the chemicals are indicat= ed to be dangerous.
6. Have available antidote and accident treatment
chemicals where noted.=0C C. 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 Precaution= s
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).
D. For general information on the characteristics, uses and
problems associated with bronze, see 05010-03-S.
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 adequa= te
for stain removal work, and these products should be purchas= ed
when available, as they tend to be less expensive. Com= mon
names are indicated below by an asterisk (*).
A. Acetone (C3H6O):
1. A volatile fragrant flammable liquid ketone used
chiefly as a solvent and in organic synthesis and
found abnormally in urine= .
2. Other chemical or common names include Dimethyl
3. Potential Hazards: VOLAT= ILE AND FLAMMABLE SOLVENT
4. Available from chemical supply house, hardware
store, or from manufactur= ing company such as Fisher
Scientific Co., or approv= ed equal
IMPORTANT: NOTE FIRE AND SAFETY PRECAUTIONS IN HANDLING
B. Absorbent cotton
C. Incralac, spray can or solution for application with a
D. Rags, clean soft, lint free, unsized, (such as old T-shirts or toweling)
E. Paper towels, lint free, such as Kimwipes (Fisher<= br> Scientific)
F. Wax and pigment under "Waxing" (see 05010-05-P "Applying
Paste Wax Over Incralac Coated Bronze)
B. Spray bottles
C. Goggles or glasses
D. Stencil brushes, 1/2 inch diameter brush end, unpainted
wood handle, white tampico fiber, metal ferrule. These
are available at most art supply stores.=
E. Polygloves, disposable polyethylene gloves or neoprene
rubber gloves, both of which will not be dissolved by
A. Protection: Provide adequate wash solutions (i.e. water,
soap and towels) before starting the job.
3.02 ERECTION, INSTALLATION, APPLICATION
NOTE: DO NOT TRY MORE THAN ONE TREATMENT ON A GIVEN AREA
UNLESS THE CHEMICALS USED FROM PRIOR TREATMENT HAVE BEEN
A. Apply acetone with the small stencil brushes or cotton
held with tweezers. Limit applicat= ion of solvent only to
substance to be removed. Contain all drips with the
clean rags or paper towels to avoid the unnecessary
spreading of the ink or paint.
CAUTION: AVOID INHALATION OF SOLVE= NT VAPOR. KEEP TOPS
ON SOLVENT BOTTLES AS MUCH AS POSSIBLE. PROTECT HANDS
WITH GLOVES, AND EYES WITH GOGGLES OR GLASSES.
B. Work in small areas at a time, completely removing the
graffiti material in one area before moving on to the
C. When the graffiti has been removed, retouch the Incralac
coating with one or two spray applicatio= ns (see 05010-11-R).
D. When the coating is dry, wax, either pigmented or
unpigmented, as required, may be applied to adjust
surface color and degree or gloss (see 05010-05-P
"Applying Paste Wax Over Incralac Coated Bronze).
END OF SECTION