fiberglassing a door panel

i have been installing for about 3 year and i am just starting fabrication can anyone  tell me if this is right(for door panel)

1st    one coat of glass on panel / dry /sand up to 6000 grit/body filler/sand again then paint

thanks

600 grit maybe.....

what i typically do is glass thick enough that i wont be able to sand through it, angle grind anything i dont want to spend 12 hours sanding, but typically i try to glass it to almost the exact shape i want. Then after grinding off the nubs, sand up to 150, clean, slap on the body filler (i use rage extreme) sand the body filler up to 320 grit, clean again, shoot the whole thing with high build primer because it shaves a lot of minute sanding off the job, let that dry, wet sand that with 320 -600, reshoot if there are any spots you can see filler on, wet sand again if necessary, then paint.