You did a great job. That's how you do clearing in a professional way. That spout needs maintenance, as we can see it is an open spout which easily catches matters and stuff making the way blocked. And a lot of neighboring roofs too. At windy times the dirt from other's roof will be filter on that spout, the owner made a good decision of calling for a help.
I think there are various tools that can be installed to purposely protect spouts. Paint alone will not do the job.
Under what category does spouting repairing belongs to? Roofing companies does the job along with their service. Plumbers also do the job. I bet both will have different service fee.
Here's what we've been doing lately - if you see something you like get in touch.
Commercial Bathroom Install
Installing Water Tanks
Restaurant Plumbing Fit Out
Water Filter Home