I've started work on repairing the access panel with the same wood filler I used on the lower shelf.
I glued some veneer on the back to cover the holes, then glopped it on. It sands down fairly easily
I finished repairing the panel and applied some new veneer. I wanted to use some flat cut like the original, but only had quarter cut on hand.
I used the old trick of applying wood glue to both surfaces and letting them dry. Then used heat to reactivate the glue while applying pressure with a J-roller.
Once the grain filler dries overnight, I'll start on the lacquer.