I always make the roof look as good as all the rest of the vehicle, and make sure the Client sees the work.
In my humble opinion, the Roof needs the work more than any other part of the vehicle, because it is out there, getting hammered with crap from the sky and all the sunlight.
Now, not long ago, I read that some Detailers do NOT do the roof, in an effort to save the Client some $$$. And apparently, some Clients will allow that...
There are these Aluminum, folding 3 step stools at Home Depot and also the Werner Platform. I think the folding 3-step stools are taller than the Werner, so you need to check it out and see what works best for your needs. I have both because it works better to have an option than to not have one...
Now, if you end up getting something like these, you must always make sure that it is not placed close enough to the side of the vehicle so that it might scratch the vehicle, and get you in deep sheet, ok ???
Dan F