Yes, I'm a guitar builder, since '75. That is a ukulele I'm showing there, but you can see the little french polish pad and an oil dropper as well as the shellac in the bottle.
I changed over to french polishing when nitrocellulose lacquer started messing with my brain, it is nasty stuff, as well as other finishes. Shellac is non-toxic, but I wear gloves because of the denatured alcohol.
You can read on-line about french polish, google "milburn french polish tutorial" but it really helps to have some one-on-one with a teacher.
French polish finish is deceptively simple, but an instrument finish is a steep learning curve.