The real way to apply the matte finishes is with the ESPC gun, the way the coatings were engineered to be applied. All other methods are inferior to non-working at all!
If you want black for BBDT, buy shiny black powder on-line or buy an ESPC gun. I love my ESPC gun. Nothing says sexy like Matte Black Ninja Boolits!
I have found ONLY acetone will dissolve the HF black powder and it is a total mess when applied! Laq thinners all vary depending on brand as to how much acetone is in there. Stick with ESPC and/or BBDT.
banger