I going to do the 4 wheel version. Like in the art that was in the 1st post of this car. The elco roof is easy to get from a 59 Chevy Elco. Just cut the roof off.. Or just cut the B pillars off and shorten the roof and make new B pillars for it.
Heres the wright up about the car.
https://www.hemmings.com/stories/2019/10/11/fyi-the-slammed-six-wheeled-el-camino-ish-cadillac-with-stacks-does-exist
I had her use the 4 MM chrome pen. That way she could get the pen tip to sit in the middle of the edges where the time is going and it should balance out the trim.
My daughter's 59 caddie update. Got the paint done. Just working on the chrome trim. All but the Eldorado trim is the chrome pen. At 15, she killed that chrome trim. Interior is all done. We outlined the seat inserts with black piping.