WOW! Looks really nice! Cant even see any layer lines, especially on the wings. Is that just bondo and sanding? Or are you doing anything else?
I am using Milliput Standard Epoxy putty to fill in and harden the layer separations, and Bondo Glazing and Spot putty to smooth the layer lines with light sanding. I started at 400 grit, then moved to 600 and finally 800 grit. It is super smooth, but you DO want to wear PPE while sanding.
After that, it is 2 coats of Rustoleum Black primer, 2 coats of Rustoleum flat black for the wings, and 2 coats of Rustoleum Black Stainless Steel Primer / Paint combo.
I am intending to put a Vinyl decal down as a stencil, and then top the center piece with 2 coats of Rustoleum Regal Red before a matte clear coat to finish everything...
On some pieces in the future, I want to try a trick of thinning the spot putty with acetone, and then spraying it on with an airbrush for super thin coats of putty.
That said, mileage will likely vary as I am moving up to a 0.6mm nozzle, and will need to tweak some things.