Seems like I always run into this problem. For my interiors I normally air brush or use a rattle can for the major color of the interior. For the detail work I've used Tamiya which has pretty good coverage and the paint seems to level out nicely but lacking on color choices. Arcylic's have a much better color selection but it streaks when brushing it on and it take many many coats to get a solid color. I tryed thining it and right out of the bottle. I just don't care for the end result. How do you hand paint your interiors and what paint do you use?