"@cyn427, FYI, the trade ban is with North Korea which is run by a dictator, not South Korea which is a democracy. Two completely different countries." Obviously, but you posted this in your OP: "I even contacted the source in North Korea and they aren't making it anymore." You could have just said it was a typo, you know. No need to be snarky.

No on the BKF please. Ruination for sure. Your fabricator needs to familiarize himself with Quartz Renew from Regent Stone Products. Make him practice on scrap estone at the shop first please. Cut a remnant in half and take one side with the factory finish home with you. Scratch the other and have him remove the scratches. If the finish on the pieces match, he's got it. Fortunately, those don't look too bad.

Try acetone on a white cloth please.

After months of indecision I finally forked out the money for quartz (I was kind of set on tried-and-true laminate, only because I've had it in homes my entire life and it's always lasted perfectly, and I just couldn't see spending thousands on the countertop part of the kitchen when laminate is so inexpensive in comparison!) I am pretty 'scared' of my quartz, afraid everything is going to damage it. I hate feeling like I have to baby something that is supposed to be an everyday workhorse! So far the issue I have is I'm already getting 'tea' stains from my adult son making tea and not wiping it up immediately if he spills a bit on the counter. They are very light and possibly visitors wouldn't notice, but of course, I do. I'm not sure what to use for that, there are SO many things you CAN'T use to clean it. So far, I just wipe it with the rest of the counter, hoping eventually they'll just fade away, but if anyone knows something safe I could try, that would be great! I haven't used the toaster on my countertop at all yet because it scares me. My MIL's quartz countertop cracked (huge!!!!) while she was using her 'air fryer'. I use an electric griddle sometimes and I'm scared to use it how I normally would've with a laminate countertop, so I use it by putting a towel down on top of my gas stove burners and set the griddle on there (which is ridiculous, really??!!). I am also 'scared' of the countertop yellowing over time since I have pretty much all-windows in one area of my kitchen. I originally wanted an 'all-white' kitchen, so I didn't really consider other products because of the usual veining. I'm not sure they don't also have to be babied though. Just my personal experience/thoughts.