I can formulate a coating that you apply either by dipping, spraying or with a pre-saturated cloth in order to prime a plastic part for hydro dipping, it will increase adhesion and ease of dipping. It can work for metals as well or other materials. If you're interested reply here, the ingredients are economical, we can work out branding if you like. The plastic part will be ready for dipping after the coating has been applied, no further primer coats are needed. Reply to firstname.lastname@example.org if you're interested.