It really depends what color was going on what color, and how decent of a job you did.

I just did a first coat today (light color over white), in a closet actually. I’m not planning on doing a complete second coat tomorrow, and just doing some spot touch ups; unless there turns out to be a lot of missed spots.

I’m some cases you can do spot touch-ups, in others a second coat is the way to go.

You will learn with experience. I know that sounds dumb, but it really is true.