Best Sealing And Maintenance in Phoenix AZ

It has been 9 months since I did the Epoxy coating. There are random yellow stains from the elements that will not be removed. The upper coating has been peeling off from wear and tear.

The team was good to work with when they were doing the job but I have called a few times to see if they had any suggestions on how to remove these stains and there hasn't been a response.