I began a project last year in September and picked a contractor, however he left certain "visual defects", which normally aren’t functionally impacting but are an eye sore for me and specially considering the amount of money I paid (i.e. there were option for even cheaper labor and I went for average expecting a proper finish work)
After COVID, I ditched the contractor and went for another team, which I assigned the task to address these visual issues. They went through the process demolishing these window borders and redo them right. But in the end, the second team as well had an issue (internal conflict, but I doubt this would have lead for a better result anyway), and I found myself left with labor on site that seemed to be mostly "unskilled workers just doing the work for the sake of it".
Below are the images of defects I am referring of. I am at a point where I feel that it’s best to pick up from here and do everything slowly on my own rather than deal with contractors, etc. I’ve been doing some research and saw a device named concrete breaker (hand version) which could help me demolish these window features and I would then learn how to re-do the finish or do it in a different material to ensure accuracy.
However my engineer suggests this may not go well in that the initial finish and new one (rendering/casting) may not blend well together. But I am still willing to take the risk but wanted to first ask for more point of views from the internet.
Anyone with enough experience may kindly advise what would be the most optimum way to deal with these visual defects?