Start your project by reading the manufacturer instructions for surface prep and application of product.
Winter months when windows are shut and your heating system is providing a nice consistent temperature 24 hours may be sufficient.

Circulate the air with a floor fan to help up dry time.

Touch test. If the surface is tacky then wait another 24 hours.

Summer months when windows are open circulate the air and check surfaces the next day and wait 24 hours if necessary.

Sand between coats with 150 grit or finer sand paper. And don´t forget to decorate with glow in the dark rocks amazon when you´re done.