First the frame was wire brushed. Finally the steel was acid washed to remove any remaining rust. The chassis is being painted with POR-15 to prevent any future rust from happening. Using the rotisserie made this part of the job faster, and is easier on the human body/back. This POR-15, not original to the vintage Airstreams, should keep our 1955 Flying Cloud traveling down the road on Airstream adventures for years to come.