5 Is it possible to fill a crack with lacquer?
Usually it isn’t. The only types of cracks that can be ‘filled’ are those where you can’t fill them if you run your fingernail across then. Stand your finger up and rub the crack perpendicular to the line. If you sense a crack then it is probably too wide to fill with just plain lacquer. If you don’t feel any bump or sense the crack then it should be able to be filled with just lacquer.