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John
For me, I look for a commercial operation that not only chemical strips the panel completely... removing all applied coatings, fillers, sound deadeners and all rust at the same time, but finishes off with a thorough hot water rinse and then a phosphate coating. Rust then be dead. For a nominal fee most will apply a thorough coating of weather proof primer sealer.
A simple mechanical removal does not get all the nooks and crannies where rust lives and hides to work it magic another day on your hard won efforts.
If you wanna kill rust, kill it DEAD!!!
Mike
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