The answer to this thread...No
I guess that's why airlines who use de-rate have that terrible saftey record
You can use your excuses for caning your engines all you want- after all, you only fly for a bunch of rich guys, you don't actually have to make money out of aviation- but the stats on airline saftey re the use of derate are unassailable.
By the way- is your aircraft equipped with the absolute most powerful version of its engine, or a flat rated version? If it's the latter, YOU use de-rate on EVERY takeoff!!