Yes, powder coat can adhere as good as hitek. Lots of folks use "the hammer test" to test theirs. Put a coated bullet on an anvil etc, smash with a hammer until the size of a nickle, if it doesn't flake off much you are good as gold. Very common it get these results.
That won't be necessary. The first time I went to BayouBullets (10-12 miles away) the owner did that to show me the durability of the coating. He convinced me!