I want to coat my body with rhino liner, is this a good move? Expensive? Time consuming, what preperations do i need to do? Or can i just put it over existing paint? Thanks. 6in 87' K5 w/ 35" BFG muds. 305/Sm465/ NP208 Kn, 4.56's. In desperate need of a rebuild. Next- Eaton mech locker... Flows.