There's a couple of members that have done that. Can't remember which build threads that they are posted in though.
It takes hours & hours upon hours. Like anything, the finished job is only as good as the prep. DA sanders, sanding blocks, lotsa sandpaper & fingers (for the corners!) are required. Then prime & sand some more! Mostly done by the owners, because shop rates add up fast. If you were to pay someone to do that, it wouldn't be long before the total would be worth more than the truck! More of a labour of love.
Someone else may be able to post up the links to those threads.
My S-15 Jimmy had the dash done, but the P.O. painted the dash white. Hated it. The worst part of the whole truck. On sunny days the reflection off of the dash onto the windshield was so bad, I couldn't see where I was going. The color didn't help, but the shiny paint sure added to that. I could see where that even a darker shiny color would give the same effect.
One of the first things I did to that truck was, when I had the windshield out to be replaced, I painted the dash in a semi-gloss dark brown. (The interior was a 2 tone tan & brown.) Sanded down first. That helped a lot but it was still an annoyance.
I think it looks good though. Just as long as it's in someone else's vehicle! Not mine, thanks!