None of those prints are post processed, they all come straight from my printers
Bottom left (grey one) is ASA. Top and bottom surfaces are just unbelivable. Side surfaces look great as well, just some small adjustments of retraction are needed. ASA is one of the best looking 3D printed materials, in fact it looks so great I would consider not painting the case at all. Top left print (blue one) is Z-ULTRAT. It looks almost as good as ASA but has less warping and doesn't suffer from cracking.
I could release the case pretty soon if I would use Zortrax materials (which are quite expensive) but I'm still looking for more cost-effective solution to lower down the price of the case.