Priming Colored Plastic

[MintFish]

When priming colored plastic/resin in white, when is the model generally properly primed? I ask because I'm currently painting some miniatures from Soda Pop that are cast from very colorful plastic in red and purple. Normally, I would prime these models in black but there are a few that I'm priming white since I want a brighter color scheme. After airbrushing around 2-3 thin layers of white primer I can still notice a slight red tinge to the models. I feel like it's probably safe to proceed with basecoating, but I figured I'd throw this one out there and see if anyone has some advice on the topic.

 

[PegaZus]

Never had run into the problem myself, but curious if a coat of black primer followed by a couple in white would have solved the issue. Or at least masked it as grey.

 

[Dragonsreach]

Primer doesn't always have to be "thick" if light tones are showing through but still covered by primer then you should be able to work you own paints carefully over them.

 

[Wyrmypops]

Wouldn't foresee a problem if its a light showing of the plastic colouring. Priming is primarily to give the paint something to grip to, the underpainting tint from the choice of primer wouldn't require it be absolute to the point of obscuring detail.