Plastic primer

[Acox99]

I have just repaired my front splitter, and I'm looking to prime it, with new plastic parts in the past I have used just used a good quality 1k rattle can primer, but as this has been repaired it needs a filler primer, do I need a plastic adhesive spray or a plastic filler primer, or will ordinary do? I see upol sell plastic specific products. What would you recommend using? I've never had a problem with shrinkage or cracking but a jimmy hill is a bit larger than a wing mirror cover!