those who did not know all the facts about the renovation eg me as the buyer and others who I am informed were not given particulars about the renovation should not have to pay for the rectification. Do you think this is a strong argument?
In a word, no. The key phrase in property purchases is caveat emptor – buyer beware. Unless you can prove that the strata committee or owners corp knew that the renovations were substandard and deliberately withheld that information from you as a purchaser, then you will probably be part of the collective responsibility for remediating any defects.
There are too many grey areas involved for you to hang your hat on this as a reliable legal argument that won’t end up costing you more money than it would take to fix the issue. And be careful that you don’t paint yourself into a corner where the OC demands the right to reinstate common property to your disadvantage.