405th Elephant-ish (needs a name)

I scrapped an armoury I had built, dug up some pieces, put them all together, and BAM, giant vehicle of death. It can hold a warthog, and a mongoose strapped to the side. It has a modified scorpion’s cannon.
Couple questions:
1. What are some suggestions for a name? I’m going a bit towards Bull, but still not sure.
2. Should I paint it? I want it to have the look like it was cobbled together from pieces, but still look 405th.