Switch to 120 grit sandpaper to feather the edges of the repair area.
How to repair rust on a truck roof.
Rust inhibitor tends to dry quickly.
With all the rust removed the exposed metal that s left is still susceptible to rusting.
This is more of an encouragement than a how to.
You want a few inches of protection surrounding the rust spot.
This is a quick summary of how i repaired it by replacing the roof.
Minor surface rust 1.
Sand through the rust spots down to bare metal.
Then enlarge the sanded area so you ll have space to feather the edges.
Treat the exposed metal with a rust inhibitor.
Spray the entire area liberally with the rust inhibitor to stop the spread of any new rust before moving on.
The rust should be gone but.
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Mask off the affected area with paint appropriate tape.