I don't work on cars. I have a Honda, so I don't need to.
But I've worked plenty on my bikes. It was a '98 Harley Fatboy which really got the ball rolling. I took the shine off the chrome with scotchbrite, put Sporty bars on it, footpegs instead of the ridiculous heavy footboards, 6-pot PM front brake, Mikuni Carb, drag pipes, tractor seat, and new tins all powdercoated in texture black, just like most of my pedals. I was very inspired by Exile choppers in Hollywood.
Now I have an '08 Triumph Bonneville. Similar treatment - texture black fenders and tank, scotchbrited M-bars, cafe racer seat, pod air filters and rejetted carbies, way better suspension, bar-end mirrors, etc. Huge fun to ride and not nearly as crazy loud as the Harley was. I love the Bonnie and have had her for ten years now.
When I had the Harley I was learning how to work on it and had help from a guy called Bill from Colorado. He was a great guy and taught me loads. I was sad when he moved back to the US.