Masking and Prep Procedure
1. Mask off with paper or liquid materials, all areas on the vehicle that will not be stripped or will be affected by overspray.
2. Use ONLY the following recommended stripping methods on sheetmetal.
CAUTION:
COMPLETELY STRIP OFF ALL PAINT (TO BARE METAL) FROM ALL SHEETMETAL PANELS TO BE REFINISHED.
PAINT STRIPPING INFORMATION
WARNING:
LEAD CONTAMINATION POTENTIAL: THE ELECTROCOAT PRIMER USED BY FORD MOTOR COMPANY CONTAINS SMALL AMOUNTS OF LEAD FOR CORROSION PROTECTION OF STEEL.
WARNING:
READ THE FOLLOWING INFORMATION CAREFULLY AND FORWARD THIS TECHNICAL SERVICE BULLETIN ARTICLE TO ALL EMPLOYEES PERFORMING THE PAINT REMOVAL OPERATION. DEALERS SHOULD CONTACT LEGAL COUNSEL AND/OR LOCAL OSHA AUTHORITIES FOR DIRECTION REGARDING LEAD EXPOSURE REQUIREMENTS.
RECOMMENDED SANDING PROCEDURE
Ford Motor Company has concluded testing an appropriate method for performing sanding and media blasting in accordance with Federal OSHA Lead Standard CFR 1910.1025.
Under this method...
Each technician performing the sanding operation MUST wear an approved respirator with high efficiency particulate filters (HEPA).
Technicians should use a dual action sander with vacuum collection equipment.
The vacuum equipment MUST be equipped with a HEPA filter on the air exhaust. Dealers are cautioned not to exhaust vacuum air into the atmosphere. Operators are cautioned to follow the manufacturer's guidelines for maintenance or replacement of the filters.
Remove all paint by sanding the affected areas to clean bare metal. Use 80/180 grit 3M Green Corp. Regalite Dust Free sanding discs or equivalent on a D.A. vacuum sander.
RECOMMENDED PLASTIC MEDIA BLASTING PROCEDURE
Ford's testing has shown that plastic media blasting meets OSHA lead standard requirements and is efficient when the manufacturer's published procedures are followed.
The operator must wear an air supplied hood using compressed air free from carbon monoxide, oil, water, and other contamination when performing this operation. This process is safe to the operator and resists damage to vehicle sheet metal.
Plastic is the most popular blasting media for paint removal. Plastic media blasting requires removal of the remaining paint from the masked areas, and a light and fast sanding of the entire vehicle using a dual action sander with 220 grit sandpaper. This surface preparation will provide excellent paint adhesion on sheetmetal. After media blasting, do not use heavy grits (36, 80) for sanding. Heavy sanding is not required after the media blasting process.
Other blast media such as Aluminum Oxide or Sodium Bicarbonate are not approved.
^ Aluminum Oxide blasting should not be used. This method removes all paint and metal coatings, causing immediate rust on contact with humidity or water.
^ Initial testing has indicated a blistering concern on freshly painted surfaces after using Sodium Bicarbonate blasting. This method should not be used until official notification that this concern has been resolved.
CHEMICAL STRIPPING NOT APPROVED
Ford Motor Company does not condone the use of chemical stripping. The majority of chemical stripping products contain the chemical Methylene Chloride.
This chemical is on the Environmental Protection Agency's list of regulated chemicals and is on OSHA's list of chemicals with permissible exposure limits. Injury to employees or the environment could result if proper precautions are not taken during its use.
MIL THICKNESS READINGS OF "BARE STEEL"
After removing all paint from the affected areas of the vehicle, zinc phosphate and gaivanized steel coatings will remain intact.
The following information indicates the coatings systems and body panels with these systems:
(1987-1989) Zinc Phosphate metal coating on all steel body panels to a thickness of 0.1 mil.
(1987-1989) Galvanized rocker panels thickness of 0.3 - 0.5 mil.
These specifications will affect the overall paint thickness readings.
MINOR RUST
3. If minor rust is present, remove by sanding or use a small blast and vacuum system.
MASKING AND PREP CONTINUED
4. Blow off the entire vehicle to remove loose dust and debris.
5. After stripping, mask all areas on the vehicle that are not to be painted or will be affected by paint overspray (engine compartment, wheels, etc.). Mask all mouldings not removed with Scotch Auto Body Protective Tape #06945.
SURFACE PREPARATION
6. Wipe all affected areas with a fast drying solvent. Wipe dry using a clean, lint-free cloth to remove all residue.
CAUTION:
KEEP WIPING UNTIL SURFACE IS COMPLETELY DRY. ANY RESIDUE MAY RESULT IN CONTAMINATION OF THE FOLLOWING COATINGS TO BE APPLIED:
^ BASF # 900
^ PPG # DX-330
^ S-W # R7-Kl58
^ DuPont # 3900S
^ Sikkens # M600
^ Spies Hecker # 7010
^ ICI # P850-1402
WARNING:
SOME OF THE PRODUCTS SHOWN IN THIS TECHNICAL SERVICE BULLETIN ARTICLE MAY CONTAIN ISOCYANATES. USE A NIOSH/MSHA OR OSHA APPROVED "SUPPLIED AIR RESPIRATOR" OR "AIR SUPPLIED HOOD" IN CONFINED AREAS FOR RESPIRATORY PROTECTION. USE APPROPRIATE SKIN AND EYE PROTECTION.
ANTI-CORROSION - SELF ETCH PRIMER
NOTE:
STEP 7 AND 8 APPLY TO STRIPPED SHEETMETAL ONLY.
7. Tack off the bare metal surface and apply two medium wet coats (.5 mil total) of self-etching, anti-corrosion primer using the manufacturer's label recommendations and flash times.
^ BASF # DE-17
^ PPG # DX-1791
^ S-W # E2-G980
^ DuPont # VARIPRIME 615S
^ Sikkens # WASHPRIMER CR
^ Spies Hecker # 3688
^ ICI # P565-597 OR 565-713
PRIMER SURFACER
8. Tack off and apply three medium wet coats (2.0 mils total) of acrylic urethane primer/surfacer following the manufacturer's label recommendations and flash times.
^ BASF # DP-20
^ PPG # K-36
^ S-W # P6-H49/P6-A48/P6-A47
^ DuPont # 1120S
^ Sikkens # AUTOCRYL FILLER
^ Spies Hecker # 5100/8590
^ ICI # P565-761
9. Sand the vehicle using one of the following methods:
^ Wet-sand by hand using 400 grit or finer sandpaper.
^ Dry-sand by hand using 320 grit or finer sandpaper.
This step will remove approximately .5 mils of material.
NOTE:
USE THE SAME SANDING GRITS FOR SCUFF SANDING PLASTIC FACIA PANELS.
10. Blow off the entire vehicle to remove loose dust and debris.
PRE PAINT CLEANING
11. Wipe the entire vehicle with a wax and grease remover type product.
^ BASF # 901 PRE-PAINT CLEANER
^ PPG # DX 220
^ S-W # R7-K158
^ DuPont # 3901S FINAL KLEAN
^ Sikkens # M-600
^ Spies Hecker # 7010
^ ICI # P850-14
12. Tack off all primed sheetmetal surfaces and scuff sanded plastic surfaces.
TOP COAT APPLICATION
13. Apply three medium wet coats (2.0 mils total) of enamel or urethane single stage following the manufacturer's label recommendations and flash times.
NOTE:
ADD FLEX AGENT AS NECESSARY FOLLOWING THE MANUFACTURER'S RECOMMENDATIONS FOR PAINTING PLASTIC FASCIAS AND BUMPER COVERS.
BASF # HS SOLO
PPG # DELTRON
S-W # ULTRA ONE STAGE/TURBO
DuPont # CHROMAONE
Sikkens # AUTOCRYL
Spies Hecker # Series # 257
ICI P420 P421
NOTE:
FORD MOTOR COMPANY WILL NOT PAY FOR CLEARCOAT ON VEHICLES THAT DID NOT HAVE IT AVAILABLE IN PRODUCTION.
14. After the paint is dry, demask the entire vehicle and clean up any areas which have overspray.
15. Install all trim (mouldings, name plates, striping, etc.) on the vehicle which were removed prior to repainting. Use applicable labor operations.
16. Clean the interior and exterior of the vehicle thoroughly, including air ducts.
WARNING:
TO SAFEGUARD OUR ENVIRONMENT, PLEASE USE PROPER DISPOSAL TECHNIQUES FOR ANY VOLATILE ORGANIC COMPOUNDS (VOC) OR EXCESS MATERIALS.