Its 90 degrees here today, but i spent 30 minutes rough cutting the ventlation cowling out to gain access inside. Glad i did as there was no other way i know of to deal with 67 years of surface rust. It was also packed with leaves I never would have seen without removal. I plan to scotchbrite the surface rust, treat it with phosphoric acid and seal it with epoxy and then install the new cowling.
