I would use scaffolding. Paint brush and roller for smooth finish, in your choice of paint. You may want to put a coat of primer on first.

In addition to what cat mentioned,rags,drop cloths,stirring stix,coveralls,head scharf,masking tape,utility knife,putty,portable lights,hand cleaner,hammer,nail set,putty knife,safty harness,sandpaper,vinyl golves,eye googles,N95 Disposable Multi-Purpose Respiratory Mask and a helper.

Need hammer for nail pops

I bought a rolling scaffold at Harbor Freight. Less than $200 at the time. It disassembles when your done so you can store it. Its only downside is climbing down to move it: a lot of up-down.