Thanks for the good advice and links. Perhaps the best advice is that it is not DIY. So, of course, that is the advice I will ignore. Gonna take a stab at it (done a lot of woodworking and furniture refinishing in my day, and actually have a buffer).
Tested a bit of lacquer on one of the scratches, and it did not bubble the existing finish, and dried completely invisible.
Plan is to sand out scratches (luckily, they don't make it into the wood). Many coats of lacquer with steel wool between. Wet sand down to 600 grit, then buff with white rouge. Basically, I'll get it really mucked up, then take it to a pro.