How long till Krylon safe?

[lastlight]

Can people who've spray painted plumbing bits that are now submerged tell me how long they waited before putting the pieces in water?

- dries to touch in 15 min
- handle after 1 hr
- apply additional coats before 24 hrs or after 7 days
- fully chip resistant after 7 days

This leads me to think there is still curing going on until the 7 day mark. I'd really like to get things fired up before then though!