What would be the best course of action to fix this rust?
I've got a fair bit of rust on the underside of my roof, where the sheet metal meets the gutter and by the window frames as well.
I can't see any obvious entry points for water when up on the roof. The roof edge comes to about 40mm from the outside edge of the gutter so I cannot see the inside edge. When there is heavy rain I see see water coming out of gap between the gutter and sheet metal on the underside of the roof, so I think water is overflowing the inside of the gutter and into the roof, which is causing it to rust.
I've removed the flakey rust and put rust converter on it.
What would be the best course of action from here?