I don't think rhino liner would hide a crack in the bilge, it's not that strong. It just gives a durable surface that is stain repellent and easy to wipe out. It also seals the surface, just like a layer of fiberglass.

easypoxy is a good one to stay away from.

I used it and it took forever to dry. It need sto go on in a bunch of VERY thin coats. I put a few heavu coats and it took literally aweek to fully dry. This wasn;t in my bilge thank god. It was anotehr fiberglass part i made

Mine's done in Sterling, which I believe is similar to Awlgrip. Seven seasons and going strong...