Hey Dnej,
Before I launch in I'd better confirm the steps for say, 1kg of regular size schoolies purchased green.
1. Boil in unsalted tap water until reddish/orangy in colour (water pre-boiled before dumping prawns in)
2. Give 'em a squick strain thru and a shake in the colandar
3. Put them into a pre-salted ice slurry and let'em sit there for a while
4. Keep'em in the fridge to eat at your leisure & they should be as tasty as.
Ok, Sounds correct enough to me. I'm gonna try that this weeekend...