Stick with the Gluvit on the interior and you won't need it. Rhino-lining the exterior is a very bad idea.
I dissagree, I see aluminum boats all the time with rhino lining on the outside, and it works great! Seals it from leaks, adds more durability to the hull, if i had a aluminum boat i would rhino line it in a heartbeat. I have a friend who has done it on his, and he loves it, going on 3 years now and it is just like new.
Rhino liner bed liner is not made for that purpose. Sure it will stick but it can lead to problems. Are you dealing with a welded hull or a riveted hull? Durabak makes a similar product but it is used on the decking and not outside the hull.
There were aluminum boat manufacturer's using rhino liner inside the hull on the decking surfaces but had so many warranty problems with separation it is no longer used. I would not apply it to an older boat due to the cost and there is no real guaranty when used for that purpose on the outside.
Now I have 3 aluminum boats and I had an aluminum bass boat I sold a few years back. Every one of those hulls has had gluvit applied. It slowly creeps into the seams and is a great epoxy coating.
What is wrong with your hull right now? Is it leaking? What shape is it in? Are you planning on salt or fresh water use?
A single 2 lb can of gluvit will seal most "average" boats.
I would invite anyone who has used rhino liner on their boat to comment and give the reason why if it was used on the outside of the hull.
I like the glovit idea but looking for something I can apply from the outside (without having to take everything out) inside the boat.
Gluvit can be applied on the exterior to help seal seams and rivets. If it is applied where it will be exposed to the sunlight .... it needs to be painted since it does not have uv protection (99% of the epoxies do not). Gluvit info here http://www.marinetex.com/gluvit.html
Probably, not the best person to ask. but, I "think" that a low side alum. boat,would just make it sit lower in water, using rhino liner. the stuff is not light, and is rigid. If you crack it. water runs between it and boat. If it were I, I would take boat to a welder and have him fix holes. NO! sense adding weight to a 12 or 14 ft alum. boat that I would have to wrestle down through the brush, to the lake. I "LOVE!!!" those "HARD TO GET TO!" fishing holes.