I also used Megs Ultimate liquid wax and it's great, but you must do 2 coats to get rid of any blotching as I found out. Waiting for my BFWD next wk to do some comparison on Black car. 845 is one of the best products for the money, ease of use and longevity IMO.
I would suggest using D300 follow up with Ultimate Polish for clarity and top it with Colonite 845 or your favorite wax. Worked great on Black Caddy for me.
The surface was polished and re-polished few times with Megs microfiber D300 once and Ultimat polish few times. No scratches, no swirls, no hazing, just shine which I will use Ultimate polish one more time before I apply any product.:props:
This test is just to get a piece of mind for myself. Although I am doing this with open mind I am not to sure there will be ANY visible difference. Time will tell.
Just ordered some and I will compare on my wifes black Cadillac as soon as it gets here. I will do 1/2 hood with Black Diamond and 1/2 hood with Megs Ultimate Liquid wax. !/2 trunk BWD and the other with Colonite 845.