Can you add clear paint to plastic motorcycle body parts to make them shiny?
Yes, you need to use a urethane based clear coat. A lacquer or enamel base will crack when the parts flex. I’ll give you a quick way to make it shine on the cheap: Armor All or Pledge. Careful with the pledge, once you start with it you need to use it regularly to renew shine because it builds up and dulls over time.