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After Drying
Acid Attack
Bleaching
Blistering
Blooming
Blushing
Bridging
Bronzing
Chalking
Contamination
Corrosion
Cracking
Crazing
Dull Finish
Feather Edge Cracks
File Marks
Flaking
Mapping
Panel Faults
Pinholing
Polishing Marks
Poor Colour Match
Sanding Scratches
Solvent Popping
Stone Chips
Water Spotting
Wax Incorporation
During drying/curing
Bleeding
Blowing
Cissing
Contamination
Dirt
Runs & Sags
Slow Drying
Hands on Metal
During Application
Bleeding
Cissing
Clouding
Cobwebbing
Contamination
Dirt
Dry Spray
Hands on Metal
Inadequate Colour Coverage
Lifting
Orange Peel
Overspray
Pickling
Runs & Sags
Silking
Contamination
Airborne Contamination, Cement Dust, Contamination, Fall Out, Industrial Fallout, Rust Specs, Specs, Spots
DESCRIPTION
Spots, speckles or splash-like deposits on, or discolouration and staining of, the paint surface. The surface may have greasy or tacky spots, be coated with particles, or feel gritty.
CAUSE
Foreign substances or chemicals adhering to, or becoming embedded in the paint. Common sources are:
a) Tree sap and resins, wet leaves, berries, fruit or bird droppings allowed to remain on the paint.
b) Metallic particles becoming embedded in the surface of the paint and oxidising.
c) Salt deposits resulting from the evaporation of liquids on the surface. These may also lead to blistering.
d) Cement or other chemically active dust.
PREVENTION
a) Do not allow any deposits to remain on the paint surface.
b) Ensure the paint film is fully cured.
c) Store vehicles under cover and away from possible sources of contamination. Take special care not to expose new paint finishes to environments likely to cause contamination.
d) If an oven or drying room is used ensure that the filtration system is working properly, and that no industrial fumes enter the room.
RECTIFICATION
Light staining may be removed by washing the surface with a mild detergent solution, followed by washing with a 10% Oxalic acid solution to remove ferrous compounds. Rinse, compound and polish to restore the gloss. If discolouration and staining persist, rub down the surface and repaint.
Mottle Effect – MaxMeyer
MaxMeyer article on the mottle effect, explaining the patchy defect, causes and preventions, with a good bullet point summary of do’s and don’ts. Click the picture below to read the full article.
Reference: http://www.maxmeyerplus.co.uk
Basic Assumptions – Must read
From start to finish, a guide on basics that must be covered when repairing and painting.
PPG Industries Automotive Refinish group makes these assumptions based on accepted industry practices,
our knowledge, past experience and feedback from our employees and customers. These assumptions are
intended to be used by collision repairers for reference and support documentation to promote a better
understanding of the refinishing process to their customers.
MaxMeyer Plus
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MaxMeyer Plus have a new website, great source of product information and business support for bodyshops. Click the picture below to view the site. |
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Reference: http://www.maxmeyerplus.co.uk/ |
