At this point as far as the HF powders go we have pretty much all figured out what works and doesn't work. We know the matte black is pretty much ES or wet tumble only. The gloss read can dry tumble or ES. Then all the rest are pretty much ES only.
I just read that you can mix 50/50 the gloss red and the gloss yellow and it will work still as a dry tumble coating. This is news to me as I never found the yellow to work wet or dry at all. Same with the white.
I did try mixing black and red together in a wet tumble batch and would not recommend anyone else try that mess.
So what other mixing combo's are there?