I use Liquimetal Coating on a permanent and then use the +1 ability of Oko, Thief of Crowns on that permanent.

What is the permanent the next turn ?

From the Gatherer rulings for Oko:

Oko’s second ability may target a permanent that is only temporarily an artifact or a creature, such as Oko, the Trickster. If this happens, the effect causes that permanent to remain a green Elk creature even after the temporary effect expires.

d:^D