Hi Blackmax and Co,
as a blackhander I have seen what I think to be early traces of something similar to this. You may note that there is some missing paint at the paint edge. To me this is the key.
I have dealt with operators where the washing program is poor to say the least. What can happen over time is you will see small orange dots of corrosion appear all over the leading edge,,,and sometimes under the paint at the paint edge. I have pics of this but am unable to attach. More than willing to share if you give me an email etc.. Once this starts it will continue and if not treated...well you get the picture.
Just me 2 cents worth
