Spray Defects

Defect Description	Cause
Sags, Runs, Lace Curtains	Viscosity: to thin, solvent balance, paint temperature when reduced.
	*Fluid Delivery:* excessive, imbalance to atomization pressure.
	Technique: gun distance, excessive pattern overlap, distorted spray pattern, gun speed too slow.
	Environment: booth temperature variations, flash temperature too cool
	Substrate: too cool, pre-treatment, surface tension.
Dry Spray- Sandy appearance, coarse texture, lacks or, varying gloss.	Viscosity: too heavy, solvent balance too fast, paint temperature when reduced.
	Fluid Delivery: inadequate, imbalance to air pressure.
	Technique: gun distance, dry overspray (see viscosity), gun speed, arcing.
	Environment: booth temperature too high for solvent balance, flash temperature too high.
	Substrate: too hot or warm when sprayed, pre-treatment temperature too high, insufficient cool down after pre-treatment.
Orange Peel - Texture appearance, noticeable hill and valleys, poor depth of image.	Viscosity: too heavy, solvent balance too fast.
	Fluid Delivery: excessive, imbalance to atomization pressure.
	Technique: gun distance too close, gun speed, arcing.
	Environment: booth temperature too high, flash temperature too high.
	Substrate: too hot or warm when sprayed, pre-treat wash temperature too high.
Solvent Popping - Minute breaks in finish generally in clusters, can also be general in nature.	Solvent Balance: too fast to allow vehicle solvents to evaporate.
	Film Build: too heavy.
	Technique: gun distance, speed.
	Environment: too cool.
	Flash Off: too close.
	Oven: too hot, lacks zoning.
Dirt - Determine what kind, fiber, etc.	Operator: clothing, hair net, other personnel.
	Environment: booth confines, traffic air make up filters, compressed air (air filter media), areas adjacent to booth, sanding blow-off, etc.
	Paint: lack of or inadequate straining, dirty circulating lines, hose or pressure tanks, paint age, excessive storage temperatures, incombustibility to solvents.
	Flash and Bake Oven: cleanliness, loose dampers.
Mottling - as with metallics. Variations in color, light and dark streaking.	Viscosity: solvent balance too slow.
	Fluid Delivery: excessive, imbalance to air pressure.
	Technique: gun distance too close, gun speed too slow, too much overlap.
	Environment: too cool (see solvent balance).
	Substrate: too cool (see solvent balance).
Others
Fish Eyes	Air borne oils, silicones, deodorants.
Blushing	Humidity (lacquers only) dew point.
Trapped Air	Micro foaming, agitation viscosity, surface tension of paint.
Crazing	Excessive film, oven temperatures.
Water Spots	Pre-treat drying temperature, compressed air contaminants.