WASTE ORIGIN:Paint and Varnish Stripping (Coating removal from parts before applying a new coat)
WASTE TYPES: Spent Stripper and Waste Abrasives

WASTE REDUCTION AND RECYCLING METHODS:

• Avoid adding excess stripper.
• Use spent stripper as rough pre-strip on next item.
• Use abrasive media for paint stripping.
• Use plastic media paint stripping.
• Use cryogenic paint stripping.
• Use wheat starch media blasting paint stripping.
• Use laser or flash lamp paint stripping.
• Use thermal paint stripping.

WASTE ORIGIN: Coating Application
WASTE TYPES: Oversprayed Coating Materials. Volatile Organic Compound (VOC) Air Emissions, Solvents, Paint Filters, Masking, and Protective Clothing

WASTE REDUCTION AND RECYCLING METHODS:

• Re-examine the need for coating, as well as available alternatives.
• Use plastic coatings instead of paint.
• Use high-solids coating formulations.
• Use low-VOC powder coatings.
• Use water-based coating formulations.
• Use radiation-curable (UV or IR) coating formulations.
• Pre-inspect parts to avoid coating obvious rejects.
• Overspray Reduction:
  • Maintain 50 percent overlap between spray patterns.
  • Maintain 6- to 8-inch distance between spray gun and work piece.
  • Maintain gun speed of about 250 feet per minute.
  • Hold gun perpendicular to surface.
  • Trigger gun at beginning and end of each pass.
  • Properly train operators.
  • Use robots for spraying.
  • Avoid excessive air pressure for coating atomization.
  • Use electrostatic spray systems.
  • Use turbine disk or bell air-assisted airless spray guns in place of air-spray guns.
  • Make sure spray gun air supply is free of water, oil, and dirt.
• Install on-site paint mixers to control material use.
• Recycle overspray.
• Keep solvent soak tanks away from heat sources and covered.
• Control bake oven temperature.

WASTE ORIGIN: Paint Equipment Cleanup
WASTE TYPES: Petroleum-based Solvents and Cleaning Wastes

WASTE REDUCTION AND RECYCLING METHODS:

• Use light-to-dark batch sequencing to reduce cleanup waste.
• Coat large batches of similarly coated objects instead of small batches of differently coated objects.
• Isolate solvent-based paint spray booths from water-based paint spray booths.
• Reuse cleaning solution or solvent.
• Use only one cleaning solvent.
• Clean coating equipment after each use.
• Wipe clean before solvent cleaning.

Sources