Pure idiocy: you'd be flushing your credibility down the toilet if everyone knew that scores were always open to revision after the fact and, on top of that, once you open that barn door nobody will ever be able to be 100% sure *why* the score was changed. (Was it, say, company pressure?)--it also renders the entire scoring process completely arbitrary since nothing will ever be final.
So no, do not do it, and do not even think about it!