Gotta be super careful with jet black.. I've been doing paint corrections for several years now and personally have owned two JB bmws and understand the attention required.
It's not hard at all to introduce imperfections to jet black. Clear is super soft and extremely non- forgiving
My best advice, do a proper paint correction followed by lsp, wash your car yourself (2-bucket method) and use high end soap (better lubricity) and microfiber towels.