C70 Coupe L5-2.3L Turbo VIN 53 B5234T3 (2001)
Cause
Silicon in the atmosphere or in the paint.
Oil or water in the compressed air.
Thinning too "quickly".
Incorrect thinning.
Incorrect oven temperature.
Incorrect paint viscosity - too thick
Too short evaporation time before baking. Should be 10-15 minutes.
Excessive application at high temperature
Action
Sand the area down to bare metal and repaint.
If craters only occur in the color coat the paint does not need to be sanded down to bare metal.
Flaking paint, peeling edges or stone chips
Cause
Poor cleaning.
Poor adhesion.
Incorrect paint selection.
External mechanical causes, for example stone chips.
Mechanical causes after vehicle has passed Quality control, in transport.
Paint coat too thick, for example after touching up.
Action
Touch up with (paint) brush or respray.
Sand down and build up a new paint coat.
Check adhesion of topcoat by applying tape and pulling away suddenly. If the top coat adheres to the tape sand down to primer (Use P 230 sandpaper).
Then build up a new paint coat.
Atmospheric effects on paint (oils, bird droppings etc.)
Cause
Aggressive chemical substances such as limestone, cement, rust and acid vapor, affect with moisture mainly affect horizontal surfaces. Bird droppings,
oils, soot, degreasing agent etc.
Droppings, especially those of sea birds corrode painted surfaces.
Action
Slight color change is affected by sanding with P 1200 sandpaper sandpaper and polishing. For heavy staining sand and build up a new paint coat. Apply
primer to areas that are sanded through to bare metal.
Wash immediately when discovered. If the damage is too great respraying is required.
Mechanical effects on the paint (spark shower)
Cause
Rusty metal particles, industrial emissions for example, on horizontal painted surfaces. Spark showers from overhead railway, streetcar or trolley bus
cables etc.
Action
Wash with 3% oxalic acid and then thoroughly with water. Polishing may be necessary for heavy damage. If particles are embedded deep in the paint
respraying is necessary.
Base Filler
Base filler
Coarse base filler
