✋ When doing my manicure, is it better to do one whole hand and then the other, or step by step on both hands?Updated 3 months ago

You should complete all the steps (from base to top coat) on one hand, then move to the second. Otherwise the formula can start drying in the open air, and each layer needs to remain slightly tacky for the next layer to adhere well. Start with your "weaker hand," the one you're less comfortable with, and finish with your stronger hand.