...BTW your Bieber avatar is awesome.-Malone
If you want it to stay in this condition forever. RUST BULLET. Nothing works better.
Some people say that Rust bullet is the same as por15, but I have used both. I would pay 2x as much for Rust Bullet as I would for Por 15. There is no comparision to rust and corrosion protection. Plus, I know they are not the same as Rust Bullet is UV stable and Por 15 is not, unless you buy the topcoat for it, then you have to use the original underneath. I haven't used it for a boat, but on the directions it says if you follow the directions on Rust Bullet and put 2 coats on a boat hull, it will protect it indefinately in saltwater use...I believe them from the results I have seen. >endplug
If you are going to rust bullet do it all.
If you aren`t cutting into structural areas, and aren`t buying pans - just start welding together patch panels, you`ll be surprised how fast it goes. You can beat on the metal and form it to fit the most difficult areas too. Use a tire or a block of wood for an anvil if nothing else.I know you aren`t experienced with welding, but once you have some practice its possible to do great work with even a $99 harbor freight welder. For this kind of work that is so rusty and dirty i`d hang up my TIG and go to the stick welder - or if no experience use ANY flux core wire welder. Just tack in an area, move on every few inches and do the same, go over it all with a wire wheel on a grinder then repeat - you`ll get much better results than if you try to tack on top of slag, etc. The cleaner you can get your weld area the better your results will be, even if its rusty and pitted.