Hey wwendy,
Welcome to 420…!
The thread you replied to is from 2013. I don’t recognize the screen names, guess those folks have moved on. Sounds like the plant is done but current pics might help.
Are you checking trichs on fan leaves, sugar leaves or from calyx??
What do the pistils look like?
Flushing can wash some nutes out of grow media and is recommended by certain nute makers like fox farms as part of their feed schedule. Flush can fix some media problems but it doesn’t wash nutes out of your buds or improve the taste of your produce. Here’s link on flushing
InTheShed No flush club
light deprivation is not the same a pre harvest dark period… light dep is how you trick an outdoor photoperiod dependent crop into flower before it’s natural time… but preharvest darkness is 24 to 48 hours