likely the wood was painted after being assembled as a complete floor, top only ... the underside of yours may have been treated by an owner sometime along the way or maybe it got a good coat of road spray from oiled dirt roads common back in the day

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics