Well I have learned a couple things while polishing this monster -
It takes a long time, I have been working on it off and on all day today. I have most of the heavy scratch removal done by sanding, the outside of the tank has been sanded and polished with Novus #3. I still need to hit the inside with the Novus #3 and go back over the entire tank with Novus #2 and #1.
My automotive style 9" buffer is too big, it is very difficult working inside the tank with it, the handles do not allow me to get close to the corners. I found an el-cheapo 6" palm buffer at Harbor Freight, going to pick it up tomorrow AM and try to complete this process before the weekend is out.
The Meguiars sanding blocks work great. I do wish I would have purchased a 3000 grit block in addition to the 1000 and 2000 I have. I think this would make the buffing with Novus #3 easier and quicker and possibly provide better results.
Overall, I'm quite happy how this is turning out.
A couple of before pics, the tank is quite hazy and has a bunch of very fine scratches in and out
The following pics show the tank with a small portion of the left side sanded and polished just on the outside.
I will post more pics tomorrow when I finish up.