So to be clear, a safety report has said that to paint the railings & “other sections” a scaffolding is required?
If so, I’d be writing a letter to the Strata Committee & the Strata Manager detailing your concerns pointing out the Owner’s Corporation responsibility to maintain common property & their obligations re: due care & diligence. If they wish to stick to the current plan of having lot owners paint railings & “other sections” then ask them to run that plan by the strata insurers & mention the requirements in NSW for work over $5K & $20K values detailed at the link in my above post.
If other lot owners have concerns have them do the same. & do address the issue at the AGM or the next SC meeting.
Don’t be afraid of communication. It sounds as though your Owner’s Corporation, Strata Committee and Strata Manager all need education. An Owner’s Corporation can’t make its own rules overriding other legislation.
BTW a licensed painter will likely be able to source paint at trade prices as well as warrant their work.