I've repaired for a customer a jewelry box that has a mirror finish, replacing a couple missing veneer chips and shoring up the joinery after it was damaged by house movers. I was told that the finish is shellac by the box maker --he's in England, --the client and I are in the US. I thought I could just use French polishing technique to add a little shellac to the repaired area and have it blend into the existing finish. But it didn't work well. It sort of streaked and clouded, and never seemed to blend into the existing finish, even though it was freshly mixed, and very dilute shellac.
I suspect it's been waxed. The customer says he never applied anything over the finish. I'm waiting to hear back from the maker, but he made it 20 years ago, so I don't expect his memory to be precise on this.
I tried lightly scraping with a very thin, flexible scraper, and I'm wondering it knowledgeable people can tell by the finish shavings what substance (shellac or wax) I've been scraping, and how to recreate a mirror finish over what I have. I'm working on the back of the box only for now, but I have some areas on the front I'd like to touch up where I replaced the veneer chips. I've created a nice smooth satin finish on the back just by carefully scraping with the flexible scraper, and lightly sanding with 1500 grit, but it doesn't match the existing mirror finish at all. The existing finish shows some of the burl texture, which my scraping job on the back eliminated, though I'm certain I never reached wood. These photos show the shavings as created, the finished satin surface, and the mirror surface on the other sides. I have limited experience with shellac so any guidance would be much appreciated.