I have HF white and few others but did a lot of experiments with the HF and my fluid bed has an oversupply of air so I need to leave an air valve open just keep pressure low enough. Once I got that figured out. Lots of trial and errors.
What I did find with HF and most other whites is cooler jig temp improves coating. If there is any shine when I pull it out, temp is too hot and cured coating suffers,
Some whites have an overabundance of clear in the already so be careful with additions. Double coating some of my whites seems to be the only way I get a nice coating.
Also, I find that only filling my paint cup with 1/4" of powder gives the best result. When fluidized, my powder will be at the 1/2" - 5/8" line. I do get some small volcano's but not real bad.
Really wish I had and ESD set up and I know white works well with that system
I have a pearl white that needs double coated and a glow white that covers well but sensitive on cure it says 375 degrees but at 375 will often get a golden-bronze look. I cure it at 225 for 30 mins and no problems but for a true pearl, it needs to have a silver//chrome undercoat.