It appears to be too late, but I looked into the rhinoliner as well and found the weight to be too much. If you're doing the floor and walls of a 14' boat, you're looking to add probably 120-150 lbs of weight to the boat.

Instead, you might want to take a look at the hydroturf product. I put it in my boat last year and it held up very well. I need to add a bit of adhesive in a few corners this week, but I really like how it came out. Plus it weighs nothing. I think for my whole boat, which is 18' x 60" wide, I added a whopping 6 lbs.

Good luck on your project... Here are a few pics of my boat...







Here is the rack...



Here is the rack on the boat...





Here is everything except the grass camo...