Fisheye or Creator effects

Substrate contamination is the most common problem that causes fisheyes and pin holes in epoxy coats. Dust, dirt, wax, silicones and even the oil form your fingers when touching the part prior to coating with epoxy will deter epoxy resins from laying flat and curing with a perfectly smooth surface. Additionally, trying to extend the epoxy by brushing it too thin, will create a creator effect where the epoxy shrinks away from the thinner parts.