I am planning on applying a ceramic coating to my car soon but am wondering what the correct way to deal with rubber seals around the window/trim etc. is. Are you supposed to mask off rubber seals so you don't end up with a shiny coating over them? I've also noticed the rubber trim likes to leave a black residue whenever I wipe them with 303 and I don't want that getting onto the paint or embedding itself into the coating. Thanks.