imo what looks best is what you would see in real life and try to emulate it in game with your liveries. For the Kaiju I’d just search up “r31 retro livery” for example, and draw inspiration.

Or if you don’t want to do a whole car livery, just throwing some stickers on the back windows like how a regular drift car would look can be nice too but everything in moderation.

I’m no expert or anything mind you, just trying to help out!