The epoxy usually does bead when applied to the mold surface. It does not matter. When the cloth is laid in it will absorb the resin. More resin may have to be applied to the cloth to saturate it evenly. There is a very easy way to tell if the correct amount of resin has been applied. The weave of the cloth should always be visible. If there are any smooth shiny spots and puddling of resin then too much has been used.

Generally speaking, the weight of the resin should equal the weight of the cloth used.

Ed S