Simoniz Auto Car Grey Plastic Primer - 500ml SIMP08D Strong Surface Adhesion

Here’s a guide on its usage Sanding : Lightly sand the plastic surface with fine-grit sandpaper (e.g., 400-600 grit) to create a slightly roughened surface for better adhesion. Apply Thin Coats : Hold the can about 20-30 cm from the surface and spray in a light, even coat.

eBay