corrosion through powder coat

[Flying farmer]

I fly a Model IV 1200lb Speedster in the UK. It first flew in 2001 and I purchased it in 2008. In 2013 I decided to investigate some small areas of surface corrosion on some lower fuselage tubes. I ended up removing all the fabric, blasting it back to bare metal before cleaning and spraying in 2 pack epoxy primer and finishing with Aero-Thane top coat before re-covering. Luckily I too discovered that it was only surface corrosion. I did find it concerning that the area of corrosion had spread under some areas of what otherwise looked like unaffected powder coating.
I flew it again in March 2015 and have had some amazing flights since then.
It is a great fun to fly and very responsive so was worth it in the end!

Michael Porter
Model IV 1200lb Speedster
Rotax 912ul