Hello Metal Matt
I used minwax sanding sealer to fill the grain. I found the brush on sealer to be a bit of a pain in the ass. For my second project (which is underway while my clear coat completely dries and hardens on the dime) I used Deft spray sanding sealer which I highly recommend. Much easier and more level coats.
I use a gray filler primer first, to further help remove the lines of the pickup and the knob and switch holes I filled in, then went with duplicolor black sandable primer. I didn't use the one that came in the kit because I feared it wasn't going to be enough (they are small cans) I wanted to keep the primer consistent. I then sprayed on the mirage color. NOTE the mirage paint is actually a clear paint that reacts to the black of the primer so treat your primer like its your color coat. Sand it smooth, look for dust, blemishes, bloches, runs, etc. It will show on your mirage coat. I actually use 2 cans of mirage paint. The more coats-the more dramatic the color change from purple to green. Another note, I live in florida, the humidity capital of the freaking world. Make sure you do not paint in humidity above 60%, It cause horrible cloudying and had to sand, and mirage coat again.
Thanks again to everyone for suggestions and praises. I am a novice to this sorta thing but I keep learning from the mistakes I make!
Tim