I go door to door with full color flyers. Don't be pushy just introduce yourself and your service, if it sparks an interest in the potential customer then go on with more info.
If they seem disinterested hand them the flyer and say thanks for your time and move on. If no one answears you can still leave it hanging on the door.
When the interested ones start asking questions your there already to look at there vehicle and point out different things that can be done and what a swirl looks like.
Always be professional, clean cut, company shirt and clean jeans or pants.
I like this because most people don't think about detailing unless they run across something like this.
Think about it, how many times did you think about detailing and paint correction before you got into it or even knew what it was?
Very few seek detailing and know what it's all about the rest you have to get there business by being seen.