Hawkeye, I think you will be pleasantly surprised how it covers evenly and I've never had a problem with blotching, but everyone is a bit different, and your scalp may be different from the next person.
Since it changes gradually over a period of a few days, you may not notice the difference at first. But if it is on a part of your body that others can see, they may notice before you do. I've used it evenly from the neck up and got compliments (from guys!) on my tan! I hope it works as well for you as it did for me.