Can someone give me some ideas for a bottom trim piece for t

So I finished my PMF today and am about 98% happy with it. The only places where I’m not 100% happy is at the bottom where it comes up to the frame. There were a few pieces that ended up not sticking very well to the wood. I thought I had it all down good but guess there were a couple spots on the bottom that are not perfect. I’m trying to decide on a way to make this look better and also protect the underlying wood. I’ve tried pushing up glue inside the pockets to no avail. It just won’t stick. So my only other option is to cut around the area and do a PMF patch but I think that’s going s to look cheesy because there is probably 5-6differnt spots where I’d have to patch at the bottom edge around the trailer.
So I was thinking of maybe doing a 6” wood trim board on the bottom that would actually come down to the bottom of my trailer frame and it would cover up the bottom of the PMF another 4”. I would use PMF on the trim board and then I would use some type of roofing sealant underneath the board to keep moisture out. Also at the top of the board I could also do ahead of caulk to help the water run off. Does this sound like a good idea? I’m thinking it would would pretty good. But wanted to check here first to make sure I’m not missing any other ideas. If you have a better idea let me know.
Here is the rubber sealant stuff I’d maybe use. Or maybe just roof caulk for RV’s. The stuff that doesn’t ever get hard.

Here is a pic of my PMF Job. Like I said I’m really happy with 98% of it. Just that dang bottom edge I’m not super thrilled about. You can also see my patch job

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So I was thinking of maybe doing a 6” wood trim board on the bottom that would actually come down to the bottom of my trailer frame and it would cover up the bottom of the PMF another 4”. I would use PMF on the trim board and then I would use some type of roofing sealant underneath the board to keep moisture out. Also at the top of the board I could also do ahead of caulk to help the water run off. Does this sound like a good idea? I’m thinking it would would pretty good. But wanted to check here first to make sure I’m not missing any other ideas. If you have a better idea let me know.
Here is the rubber sealant stuff I’d maybe use. Or maybe just roof caulk for RV’s. The stuff that doesn’t ever get hard.

Here is a pic of my PMF Job. Like I said I’m really happy with 98% of it. Just that dang bottom edge I’m not super thrilled about. You can also see my patch job

Sent from my iPad using Tapatalk