Update:
There is definitely a texture to the stock front panel. Mild wet sanding it does remove heavy oxidation and most ghosting, but also flattens out part of the finish, while not going deep enough to flatten it all over. So after polishing you get a look from certain angles that looks like heavy orange peel or hail damage.
I'm giving up on any thought of trying to flatten it out with more wet sanding due to the amount of material that would have to be removed. I'll post a pic when I'm done and get the replacement decals on.
Also, I bought replacement front decals from rvdecalsdirect, but they do not perfectly align (which is why I was trying to remove the ghosting). The font is a little different and the "road" image is not the same exact shape (you can tell from the images on the site). I still plan to try them out, but after this experience, I likely will not replace any of the ones on the side unless I can get exact oem replicas.
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https://www.rvdecalsdirect.com/keyst...rt-2013-travel)
TLDR; Do not wet sand the front panel of a 2013 passport to try and remove ghosting. Just buff/polish out as much as you can and quit.