This isn’t really proxy farming – at worst it’s campaigning or caucussing. In proxy farming, owners were persuaded, tricked or bullied into handing over their proxy votes. In a block not a million miles from where I sit now, the chair used to ask owners who didn’t want to go to the AGM how they wanted to vote on the few issues that they cared about, then he’d diligently follow their wishes … but add their undirected votes to his tally.
One year he had more votes than everybody else at the meeting put together – and this was a huge building.
What has happened here is that the antis have gathered up enough support but these are real votes (unless they are filling in blank votes, which I think may be illegal).
Your best way forward is to persuade a majority of owners that there is a financial detriment in not painting these townhouses and that failure to do so is a false economy. That usually does the trick and you can then encourage them to vote on your side.
Calm and considered persuasion, with no talk of vote farming or conspiracies, will get you there.