Reg- Aluminum Dome Roof Maintenance 1

Main issue is to get the right people and right equipment on the job- specifically, people already familiar with the type of work and the fall protection required.
You may be able to access some areas via a boom lift.
Access via a large crane and personnel basket may be possible if the surface is not safe to walk on. That would be a major move-in expense for the crane.
The dome manufacturer may have some resources. Industrial painting contractors that do tank work would likely have the rigging and knowledge for it.
Not a good field to try to jump into on your own, though.
Fall protection is high regulated in many areas, so familiarity with safety regulations is required as well.