I don't want to go out with him until the acne clears up
Does him having acne really bother you this much?
Yes, it does and it's embarassing.
Go out at night or something dark. So you can't see that acne on him.
I don't want to be out with a guy who doesn't put any effort into his skin.
Just because he has acne does not mean that he does not put effort into his skin. Some people are just more prone to breaking out in comparison to the majority. Try to be more concerned with his personality over how he looks.