Recently after getting the 3D printing bug again, I’ve been looking at methods of smoothing PLA prints. With ABS you can use Acetone Vapour Smoothing to smooth out your prints, but with PLA the chemicals to do this are a lot more noxious.
Malcolm, over at the TVRRUG had recently purchased some XTC-3D to test, so it seemed an opportune moment to try it out. XTC-3D is a 2 part resin that you coat a printed object in. As it dries it pulls itself together smoothing out the layers in the 3D print, or so the blurb says! To test this we took a few printed objects of varying qualities and applied the resin as per the instructions (2:1 of parts A:B). We mixed it up in a plastic container and then spread it over the prints using some foam brushes. It was then left to dry over night.
The resin has made a significant difference, especially on the cat model. On some of the train pieces it glooped into corners so might have been put on too thick. On the red piece it was put on too thin in some places, but a second coating might resolve this. The next experiment will be painting on top of these to see how they come out!