I use black vinyl dye https://amzn.to/2LdFI2k  as a base for all my nerf guns and plastic prop weapons. I've found it works really well on the 3D printed parts I've ordered.  It bonds to the plastic, so it won't chip off or melt off in a sweaty hand on a hot day. I did a rush job on painting Poe's blaster, so I'm not going to share pictures here. But here's what I used!


 


On top of that, for Poe's blaster, I used:


https://amzn.to/2LgNLM8








https://amzn.to/2N9wncw






And one like this for the shiny bits - https://amzn.to/2zznpmY







And a clear coat on top: https://amzn.to/2NNEvAP