Its not leather, its vinyl. To cover an entire interior in leather would have made the price of the car much higher. Most manufacturers use vinyl...go rub your shoes or wallet, then touch the car and you'll clearly see the difference. The only leather you'll find in a G3 are the steering wheel grip and seats.
As for the blue and yellow interior...yuck. Sorry, but that's tacky. Also if you're having difficulty painting interior pieces, its most likely a preparation issue. You can't just spray down the paint and expect it to stick. Keep in mind, no matter what it's going to peel at some point. Unless you garage your car and never,ever let it sit in the sun, it WILL peel.
You won't be able to purchase a custom dash...if you want yours professionally painted, you'll have to pull your dash out and take it to a paint shop...or have them do it for you (labor $$$$). Personally, I'd leave the dash black the way it should be and save your money. You'll probably get tired of the blue/yellow theme eventually and by then you'll have ruined a perfectly good dash.
