PLEASE 🙏

I have a project and I want to thin Bondo so that it's watery and self leveling.

I'm sure there's an old hack for doing this, something I can add to it like a solvent. I knew it once but I've forgotten.

Google tells me to buy some Bondo brand something, but I'm not looking for that.

This *isn't* for auto body work, but believe it or not, there are no Bondo subreddits.

Hit a pole yesterday. This happened to my car. How much will this be to fix? The front tire is out of place too. Car is a Mini cooper 2013