Yes! A clear coat will help to smooth out your vinyl decals and will seal them into the rocket. It will help keep them from being damaged or the edges from peeling when handled often. Clear coat like you would anything – adding several thin layers is best. For better finish, sand lightly between coats. As with any paint or clear coat, it’s best to test first to make sure things are compatible. Just ask, and we’d be happy to send a piece of scrap with your order to test with!