BillE, we've been wondering for a while if we should coat the bottom of our trailer with the truck bed lining. This was a very timely and appropriate topic for us; our trailer has a fiberglass bottom, however, some call it a "tub" and the plywood sits above it inside. So it probably wouldn't hurt to paint
the fiberglass bottom and the rubberized coating should help at least some rocks bounce away without chipping. Right now we're patching dozens of chips and holes everywhere in the naked shell. Hope this thread has been helpful to you, all our very best on your brand new purchase...it'd be wonderful to have a brand new egg!
For YOUR situation, no, I wouldn't coat the plywood bottom. Not at this point, anyway, not with it brand new. It would be a good idea to contact the manufacturer and find out what their opinion is. They should have one!
Hope Darwin is kidding...I've seen some bullying threads, but this doesn't look like one of them. Nor did that seem like a hijacking, and your response to that was very kind and I appreciate all the good civility. If he IS kidding, then ha ha, good joke on me! I took it a bit too seriously! My bad. If he's NOT kidding, I refer him to the "sawdust toilet" thread to see some bullying in person--it's awesome! And the moderator did finally step in and call a halt...one of the most entertaining and cringe-worthy threads I've seen in six months.
Again, our very best to you and your new egg! Happy camping!