If I may add, just a thought; using a two graphics card rendering solution might assist you in doing this.
One GPU that is dedicated too solely rendering visual and what not (a newer better one out of the two is best tasked for this).
And
One GPU (doesn't need to be top of the line GPU to accomplish this, older enterprise cards are good for this task) dedicated to "de-noise", clean up, crisp the image (whatever you want to call it) from the render GPU.
Having only one GPU to do this will slow down development time to a crawl due too having to pass the visuals back through a singular GPU multiple times if used as a "de-noise"ing GPU and renderer, meanwhile preventing its use for image creation - rendering more visuals during the "de-noise" process. Attempting to do it all in one pass would degrade both performance and quality for each process (the renders and the clean up).