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Originally Posted by TOGWT:10392127
Paint will sometimes show ‘hazing” after removing a car cover that has not allowed hydration (transpiration and evaporation of moisture). The temporary hazing, which can appear as a slight dull discoloration, stain, or raised surface in the paint is caused by the paint finish absorbing moisture
Correction- In most cases, by applying Isopropyl alcohol and exposure to heat (sunlight) allows the moisture to evaporate within a few hours. For colder climates, moisture evaporation recovery can be accelerated by placing the vehicle indoors and using a portable infrared heat lamp (or professional-type heat gun). Allow the affected area to outgas by not using a wax or sealer on the affected are for a few days
In extreme cases if a waterproof cover i.e. a tarp is used to cover a vehicle it may cause delamination. A polyurethane paint (high solid / low solvent) clear coat can absorb moisture; as water molecules are smaller than a cross-linked clear coats molecule.
Moisture (condensation) can permeate and break down the chemical bonds between the clear coat and the basecoat; this sometimes produces small bubbles in the paint surface. This will also cause delamination between the layers since once the chemical bond is destroyed; only the weaker mechanical bond remains.
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