It took 6 days in an alcohol bad before it was clean. (I warmed
the alcoholtill about 40 degree Celsius, I use the alcohol sold in
wrong alcohol. Too dilute, and it’s usually rubbing alcohol,
Shellac this better with ethanol or methanol. Instead of the grocery
store, go to the hardware store and get a can of denatured alcohol.
Sold variously as “stove fuel” for small camping stoves, or as
"denatured alcohol", or as shellac thinner. You don’t need to warm it
beyond room temp, though it may work a little faster. But if you have
an ultrasonic, put the bracelet in a beaker with that alcohol in the
ultrasonic. Cover to reduce fumes. The ultrasonic energy and the
right solvent will take the shellac out in minutes, not days. At
most, I’d guess 10 or 155 minutes would do it with an ultrasonic. If
just soaking, might take an hour or so.