Great work, it's hard to make white look so slick - Werkstat is great at this!
Stealth, I wouldn't choose it on black tbh. It's better suited to lighter colours IMO, but the Carnauba version of it looks well on black.
What are you using on yours at the moment? Good choices on black would be Pinnacle Souveran, Vics Wax Concours or something like Zymol Glasur, if you fancy something a bit more boutique (I have some if you want to try it)
Also, I'll have full access to a unit from next week, so if you're after somewhere to detail your car... let me know! :)