Don't be afraid to use Bondo if you go that route- I repaired the dash in my first truck with it after smashing my fist onto the corner. It had 0 cracks 20 years later and nobody could tell it had been fixed and painted. The entire corner was Bondo.I may just try that. I have sem paint left over! Good call dude!!!
And if you're going that far you might check the cost of having it upholstered after you smooth it out. You could go fully custom or just stock covered with the fabric of your choice.