Zookeeper had its own original art. Standard cab shape, but unique artwork.
As for removing paint, there are MANY threads here discussing it. Search for the Moon Patrol restoration. I think there was also a Stargate restoration and a couple more.
See if you can scratch off the paint first. If so, it's gonna be an easy ride! If not, then proceed with varying strengths of "stuff". Don't start right off with full on paint stripper. Sometimes it strips the original paint off too.