One can obtain a Badger Airbrush at a hobby store or online for $30. I recommend one highly if you're going to dye your interior. You don't want brush marks. The dye can be thinned a little for easier spraying. You'll find lots of uses for the airbrush too. An inflated car tire can be used as propellant. The best thing is to take interior apart, thoroughly prep leather, mask off parts like metal hinge on seats.
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