Is the top aluminum or iron? If the stain appears to be on the surface (versus corrosion), I would try more "solventy" cleaners like lacquer thinner or carburetor cleaner. Steel wool or synthetic pads with a solvent or mild abrasive like automotive rubbing compound (red is the coarser stuff) can also help with stubborn stains.
I called Grizzly and the person was super nice. Hopefully it will not incur any restocking since it doesn't seem to be fully operational. Was concerned when opening it that the table was on an angle. Initially excused that with the thought it was for space in shipping. Oh well, will just have another drive (its about 30-35 minutes from home) to return it next week. Sad as I was excited for a new tool.🤷♀️
Cannot get it to lock in place at all. That's a deal breaker for sure. The stain is also frustrating and I'm wondering if that is related to the table being tilted so much that the protective stuff they put on those surfaces wasn't able to adhere. Will see what they say when I return it.