After the 24 hour curing period, will a coat of waterlox on top of the cured waterlox coat "bond" with the coat underneath it or is it a separate layer? If it bonds, how long can one wait before the next coat and not have an issue?

If I need to wait some time between coats, do I need to scuff the topcoat before applying another coat of waterlox? This is the original sealer/finish.

Thanks,
Mark