It must be the mircofibres that are causing me the issues with black then, I find it looks fantastic till i take the polish off, then I get holigrams and it gets really frustrating!! Can get great finishes on every other colour, even really dark blues etc. I thought I might not have been working it for long enough but working it till the polish is clear and everything has broken down, its just a right pain!!
The GT4 i'm doing just now is probs the worse car i'm came across lol
After a couple of passes with some medium cut polish and 3m compound pad
No refining of the finish has taken place to remove the remaining fine swirls and holigrams yet
P.S. Sorry for hijacking your thread