In most cases, yes, a trim restorer has a chemical makeup that will remove wax coatings from your trim, but by the time you resort to using a plastic restorer, there’s probably not much wax left on your trim anyhow. In its place, the restorer will leave behind its own layer of protection, so not to worry. As far as your car’s paint job is concerned, if you get some restorer on the paint, it shouldn’t be too damaging unless you really rub it in. Just wash it or wipe it away with a damp cloth.