Originally Posted by scottIN

They're full of it. They may slap a quick coat of wax on a car, but they're not going to spray it. Don't let them try to charge you for it.

The sticky residue is from the protective wrap - usually it's just around the edges, but if it's been on there for too long it could be everywhere. A good bug & tar remover will take it off - just be sure to use a microfiber towel and wipe gently-don't scrub-the residue could have particles embedded in it.

After you get all the dust / sticky residue off, you'll probably need to clay it - especially if it's been sitting in an industrial area / warehouse.

Personally, I don't let the dealer prep my car. They can take all the plastic off for inspection, but that's it. You never know what their 'detailer' is going to do. I've seen dealers scrape wrap residue off with a plastic razor blade and leave scratches all over the car. Or hit it with an orbital to take it off - nothing better than swirled paint straight from the dealer's lot!