little sparkle noise ...

Love all the details! Small recommendation... The cans and all the small things along the wall. Rotate some of them just so they look a little different cause right now they are the exact same. Past that I love it. I agree with FreakyDroid above so you can get rid of any artifacts, but great job over all!

Thanks freakydroid ..

Try increasing the DMC max rate in the Image Sampler, which in turn will increase your render time, but you will get a cleaner result. Try increasing it with increments of 4 or 5 and see where it gets you. I'm assuming you have the noise threshold in the DMC sampler set lower than 0.01, which is the default. Try setting that to 0.005 before increasing the max rate in the Image Sampler.