Urethane is ultimately the best for abrasion resistance on the bottom of your boat. You can purchase a kit of System 6 from Man of Rubber or Rocky Mountain Adventures and roll it on. They have instructions on how to prep and apply, but you'd want to know the surface you're preparing. Note: If the bottom is worn through to the fabric threads (past the top coating), you should patch those areas first, then apply the urethane.
For the top chafers, you can use Hypalon. Stabond 2 part adhesive is what we recommend.
Here's our gluing instruction for Hypalon glue jobs. It's a pretty straight forward process overall. 1. Buff 2. Clean 3. Apply Glue 4. Compress 5. Clean-up https://hyside.com/hyside-owners-manual/#instruct
Hope this helps!