Shanx, this is perhaps a good example of bleaching of paint by sunlight. The UV rays from the sun bleach certain pigments and it results in "whitening" of the pigment. In the above case, the original sky blue colour of WAG-7 has bleached to become a...

Shanx, this is perhaps a good example of bleaching of paint by sunlight. The UV rays from the sun bleach certain pigments and it results in "whitening" of the pigment. In the above case, the original sky blue colour of WAG-7 has bleached to become a shade lighter. You can see this phenomenon has happened in patches, most likely due to the paint thickness.