The goal in this test was to get essentially an optically clear, acrylic part. The challenge is to slightly round the edges without so much abrasiveness that an ‘orange peel’ affect occurs on the surface. This will make the polishing step nearly impossible.
The first step was to vibratory tumble with a Plastic Media for nearly 8 hours. This longer cycle time was needed because the Plastic Media is not as aggressive as something like a Ceramic Media. The wet tumbling process slowly rounded the edges and left a uniform, matte finish on the surface.
The second, dry tumbling step used Hardwood Cubes and the Hi-Glos Final Finishing Cream. This high polishing cream is very effective when coated on Hardwood Media to slowly polish the surface leaving a scratch free, totally clear result. The step was about 6 hours but can be longer depending on how the resin or plastic reacts to the tumbling process.