I'm one of those that have polished their toons because the old owner didn't take care of the shark hide and the toon looked terrible. So during the off season I did the labor of removing what was left of the shark hide then going through all the steps of sanding and then polishing with a high speed buffer. Then reapplied two coats of shark hide. I was quite happy with the results. And while I kept the boat most of the summer we ordered the wife's dream boat and this one had to go in for warranty work. We now have the new boat and the old boat is on the dealers back burner to complete the warranty work before the put it back on the market.
It is a lot of work, and they looked great through out the summer and many people commented on the polished toons. It is a process that you need to take your time and think things out before you start putting things to metal. The high speed buffer will hit things you didn't expect so hold on tight and make sure things that can be removed are removed. I didn't think I was going to even get close to the transducer so left it in place but the high speed buffer sucked it's cord in to it and the transducer had to be replaced and my garage door cleaned up. LOL Also, it's a very dirty job. There are some video's of how to do it on the YouTubes, also spend some time learning how to polish aluminum on some diesel truck polishing channels, it will help.
The new boat, the manufacturer put shark hide on and missed a ton of places, I am sure I will end up polishing those toons in a few/couple years.
There are also video's out there on giving the toon a more machined look other than the mirror finish that may be a bit easier, and to be honest they didn't look bad. All depends on what you want. Either way you will need to keep up with the maintenance of your toon and any protectant that you put on them, unless you don't mind the way they look.