After reading all the posts on the forum over the past several years about keeping a nice finish on Toons, I'll finally weigh-in on the subject.
First, Sharkhide is a must on any aluminum exposed to the elements. Obviously having it applied when the boat is new and prior to being dropped in the water is best for maintaining the factory "mill" finish. If the toons have already experienced oxidation and staining the only remedy is for an acid wash. An acid wash will actually dull the bright finish but the toons will be clean and of a uniform look. Only after the toons are cleaned can Sharkhide be effective.
It always amazes me that someone can invest 30k, 40k, on up to 90k on a boat and not take some preventative measures to keep it in nice condition. So often I see new (current model year) boats on the lake that after just a few months look trashed and old. Then again, I'll see older pontoons on the lake that have been kept up and it's hard to tell them from the new models.
Personally, I prefer the polished approach to keeping the toons looking good. I have to agree that the first polish can be labor intensive, but with a product like Sharkide and minimal maintenance thereafter, the toons can keep the brilliant shine for years. Once the aluminum has been polished and the Sharkhide has been "properly" applied, it will easily last for two years of use. After that it is simply a matter of very light (touch-up)polishing and a reapplication of Sharkhide. After completing polishing jobs on three different pontoons over the years, I have found that with proper equipment and processes, the initial polish of the toons is not that difficult or time consuming.
Now to be fair, I live up in Minnesota, and our boating season is only about five months long. That leaves seven months that the boat just sits on the trailer. With our cold, dark and snowy winters, working on the boat is a fun break from the monotony of the season so it feels less like work and more like a worthwhile activity. If we had a boating season that was year round, I would certainly feel different about this. During our boating season, I choose to minimize any time spent on upkeep of the boats.
As I look at all the Benningtons that have been built, I have to say that Derricks boat is magnificent. Imagine how it would look sitting on polished toons.... Spectacular.