We've been shopping for a pop-up camper and I joined when I found this forum. We've found a 1998 Coleman Redwood and looked it over. We're planning to buy it but wondering about the underneath side of the floor. There's one soft spot at the rear of the road side. The seller says it was probably from spray off the tire. I should've checked the other side to see if it had similar damage. The rest of the underneath floor looked clean & solid but it surprised me that it didn't seem to be coated or protected with anything. Is it common to have exposed plywood underneath a camper? Would it be worthwhile to protect it with something?