I've bought a 2002 4WD Mercedes-Benz Sprinter high roof van that's partially converted as a camper. It's been well maintained but has some rust along the bottom panels and underneath, though not bad for its age. I'm wondering if I should clean up and treat the rust thoroughly or just give it a good Waxoyl or similar and forget about it. Part of that consideration is whether to strip out the camper beds to get in behind the plywood and under the plywood floor. I'm unsure if it's worth the effort? Also, I've have people tell me it's a very desirable van with the 4x4 and the 313 CDI engine. Any thoughts?