Reddit mentions of Magic Rub 1954 Block Eraser

You're saying the blemishes are the ceramic coat that got on the trim? Ooof. Typically the only thing you can do to remove a ceramic coat is abrasion/polishing. About the only safe thing I would suggest is this: https://www.amazon.com/gp/product/B002VCV4OQ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

They work perfect for getting dried wax off of trim, so I can vouch that it will be safe (and is "abrasive"), but won't scratch your trim. I've used this on the CX5's wheel arches before without issue.

If that doesn't work, I'd ask for some advice from r/AutoDetailing before doing *anything* drastic, they'll set you straight.

$0.70 eraser!

I hate that! I've found that by rubbing it on some fabric first it removes that surface layer and will create a fairly non-smudgy surface.

Best by far is the "Magic Rub" That thing is frickin' magic. I've used them since college (for decades). The Magic Rub will remove pencil completely, cleanly, leaving only the impression in the paper.

I keep one of these in the shop:

http://www.amazon.com/Magic-Rub-1954-Block-Eraser/dp/B002VCV4OQ

It erases most pencil marks on wood and paper nearly completely. Better than both pink erasers and the Mars plastic. I use all three for sketching. The Magic Rub is the nuclear option.

EDIT: don't buy it from that amazon link. I think I last bought a 3-pack for $3 at an office supply store. Not hard to find.