Rick, On the trailer, since it was new, we just gave it a very good wash with Dawn and microfibered it dry. Can also use a leaf blower. The Permanon comes concentrated and you mix it yourself with water, spray on as a fine mist and micro fiber off. They say using a little force while drying gets the particles into the pores. The car was done with another ceramic coating product 2 years ago. It had never been waxed. Again we just washed with Dawn, dried, and misted Permanon on, towel drying it. They recommend two coats of 10% for he initial coating, then anywhere from 3-5% thereafter as needed. Our truck was also done several years ago and still looks great but it’s time to give it a touch up. I have been testing the marine formula on our cars which Permanon says is fine to do. Very pleased with the results. It’s not the heavy duty method that many of the pros use and I expect to redo yearly. Since it’s so easy, it’s no big deal. Many of the boat detailers are using a similar product and want 4K or so to do it. Of course it depends all about the prep. Personally we like to be able to do as much work on our boat as we can. Hiring someone to use the product that flashes on is considerably more expensive.