Hi all. Brand new here and already asking for assistance. I've had a Sterling caravan that I love dearly for the past 6 years. A few years ago I had a prang with a bollard that damaged the wheel spat, lower rail and plywood underside a little. Wasn't a huge prang and I fixed up the wheel spat fine. The sideways force of the prang cause the plywood underside to crush in on itself if you know what I mean. The top side inside the van under the vinyl is just as it ever was. The base ply is all splintered but not all the way through to the foam. I continued using the van and it has been perfect. Water never caused an issue underneath and the rest of the van is as dry as a bone according to my damp meter. I'm getting a new van soon and want to sell this but thought I should get it looking a little nice underneath. Not sure how to best tackle it. I thought about brushing some adhesive into the ply as far as I can, then have it supported from underneath, pushing up against the repair until it sets. Not sure. Any ideas? It looks worse in the photos as it's all zoomed in. Any help offered would be great, even to reccomend a particular adhesive.