And we have a winner!
Did a little more experimentation with getting a good, smooth, metallic appearance to the Have Glass grey. I have settled on these steps, just in case anybody else wants to try it.
1. MRP280 Have Glass Grey
2. Rub with powdered graphite
3. MRP125 Semi-Gloss Clear to seal the graphite onto the paint
4. Decals, MicroSet, and MicroSol
5. MRP126 Semi-Matt Clear to lock it all down
Nice metallic sheen with no little sparklies. Looks pretty close to photos taken of USAF F-35As in the last couple of years.