I painted the top and bottom of my cab floor, the underside of the bed floor, and the inside of my rocker panels with POR-15. I just wanted a little insurance that the rust wouldn't come back. I also coated the bottom of my cab floor with some spray-on undercoating. It is some tuff stuff and adhere's very well to metal. My truck won't be driven in rain/snow, so the POR-15 should be more than adequate to keep the rust away.
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Jason - '67 GMC swb | '57 Bel-Air 4dr hardtop | '56 210 4dr Wagon | 2000 GMC Sierra
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