also,
(I am learning this as I go along with a project)
depending on the base coat, you either have to flash off the base and wait a short time, or an extended time when using the clear coat.
They can off gas so it can be 5-15 mins or 24-48 hours
Again, with clear coat, you have to wait a short while between coats, allowing just enough time that the previous is tacky (5 mins or so) and apply another to wet down the first
Painters often spray a small bit of card/plastic/metal as a test patch. They can touch that and not worry about marks. When it is ready, they spray the actual work