Reliability Testing Paint separation from metal

[McKofi]

If anybody in this forum has done Accelerated Age Testing on paint peeling/separation from metal substrate or have some knowledge of paint peeling reliability case study please help me to understand this:

1) Best fit distribution for paint peeling.

2) Root cause(s)of paint peeling from metal

[Anonymous]

I see asking how to model. But root cause? If you do not know?