I'm using Glasscast 50 to fill a mold over a photo. Despite spraying several coats of Acrylic lacquer, and coating the edges carefully, I'm still getting the resin creeping or leaching into the edges of the photo, discolouring it's appearance. Whatever I use must be fully transparent and not react with the resin cure process. Help! What can I use to prevent this happening???

Are your edges properly sealed?  Normally it would be hard for it to come in top and bottom where as edges can be more difficult to get right. 

Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant