POTENTIAL CAUSES OF THE PROBLEM

a) Application with bad paint quality
b) Lack of cleaning on substrate (dust, loose parts etc)
c) Bad preparation of substrate (bad application or no primer at all)
d) Application made without having rubbed metal surface
e) Application made before primer got dried
f) Application made in very thin coat

SOLUTION

1: Remove all loose parts with a sandpaper or steel brush and then clean surface thoroughly
2: Apply one coat of STATUS RUST PRIMER
3: Apply STATUS DUKO, gloss, extra strong enamel paint, in one or two coats