So it sounds like this eliminates all of the sanding that is usually involved in polishing. Is that right? You can just apply it to bare metal and get the results as seen above on jr's intercooler?
I know Jr. just put it on his intercooler to see how it did without sanding. I think it came out mint. For even better results sand the material first, but to answer your question it works very well on unpolished aluminum.