The rear windows are prone to rust, simply clean and paint them, coat the contact areas with liberal coatings of Vaseline or similar.

The front hubs do get warm, and these are a source of potential problems, these being full of water and compacted mud which causes them to fail.

This problem is easily overcome, remove them and clean thoroughly, the wheel bearing is accessible so adjust and pack this fully with grease. Oil the hub assembly by filling with engine oil and draining to ensure full lubrication, then pack this fully with grease until it is slightly overfull. Assemble the hub back onto the vehicle, this will force any surplus grease out, and with the wheel bearing/front hub full of grease, no water or mud will enter the unit; instant reliability.

Use a marine or waterproof lithiun based grease, this costs a little more but will ensure any water which may enter the hub will not attract itself to the metal surfaces. Dismantle the hub annually, adjust the wheel bearing, repack the entire hub again, this will prevent future problems.