I was doing final assembly, got to the middle iron and noticed corrosion. I have no clue when or how it got there. At first I thought it was damaged when I knocked the iron over and onto some tools while putting the front rotor in.

After closer inspection and even testing a bad iron by pushing it over onto the same tools. I found that it wasn't damaged when it fell over. The only thing I can think is that I sprayed all the parts off on Sunday. After sitting for almost 2 years they had gotten dusty, spider nests, etc.

I tried cleaning the surface with some paint thinner but it won't come off. I can feel the marks with my finger. Obviously I'm concerned how they will affect compression?







My thoughts are that they must be from hosing the parts off a couple days ago. I did not coat them with anything afterwards I was expecting to do the rebuild Sunday. It has to be recent, I can't believe that I'd miss something like that.