I could paint my derringer pink after I mill it out to .9mm
It already has ruby red handles I fabricated for it. But I think I'll buff it out to shiny metal then re-blue it.
Dark with those red handles will look pretty good.
It would have to be powder coated to make it pink. And at only two shots it falls short of most offerings.
Your best bet is a .25 auto with an 8-10 round clip, custom colored.
They are tiny, and if you are legal such a thing can be had on a budget.