What about Dupli-Color Jet black with Matte clear coat?
Did you miss a tongue in cheek icon or was that a sincere question?
I'd 'maybe' consider that for a wiper motor rebuild... or the back of the gauge cluster.

I've shot some DP for OT stuff. It's handy to match stuff with in a pinch but I wouldn't use it on anything I have any 'Assumptions' about lasting on.
SPI makes a flat back that can be mixed/reduced for varying degree's of 'flatness'. It would be a step or three up from BB were the DP a step or two down, in both longevity and quality.