Let the resin set, at least 4-6 hours (depending on the amount of catalyst used) before demolding the gems. (It may take a practice run to get a good mix.) Then you want to rough wet sand the gems with 220 grit sandpaper, and then refine the shape by wet sanding them with 600-1000 grit sandpaper for a nice, smooth finish. (I do all my fine detail sanding on a piece of glass to ensure I have a perfectly smooth and flat surface) The gems will appear to have a haze or fog to them, this is normal. Finally, spray them with the Krylon crystal clear (or a clear gloss spray), and you’re done!
Monday, July 21, 2014
The "Arms, Armor, and Awesome" cosplay blog brings us this excellent tutorial on casting faux gems and crystals with tinted resin.