When applying POR-15, do you put it on the inside or outside of your car? My Z was & still is pretty solid accept for some very little cosmetic rust spots here & there. My floor boards were getting wet until I put a cover over it. Since then I have pull ALL of the carpet out and noticed that the boards were still solid. It hadrust coloring though. Should I pour the POR 15 there or under the floor boards? I was planning on getting it painted & treated around July or Aug. Should I wait until then or do it now? I'm also ready to get it tagged up & ready for the spring.