Certain types of paint appear to produce a shiny bronzing effect. Why is this?

Full coloured paints based on certain pigments, such as Prussian and phthalocyanine blues, can produce a metallic lustre. To cure this irridescent effect, thoroughly clean down the surface to remove all dirt, grease and surface contaminants, then rub down with a suitable abrasive and dust off before repainting.

This defect is more often seen with spray applied atmosphere paints. To remedy, wet flat and recoat.