We recommend applying at least two layers of epoxy resin for added surface protection. There are two ways of adding additional layers of epoxy resin to the existing layer.
1. Apply the next layer while the last layer is still tacky to the touch. Allow the first layer to dry for 3-6 hours and lightly touch it with a gloved hand. If the epoxy resin coating feels tacky without pulling up like taffy, you can apply an additional layer at this time. Applying an additional layer while the previous layer is still tacky gives you a chemical bond.
2. Apply the next layer after the last layer has dried for 24 hours. Lightly sand the last layer with 220 grit sandpaper, remove any debris from sanding, and apply an additional layer starting with Step 1. Applying an additional layer after sanding will give you a mechanical bond.
Both methods are excellent options for applying additional layers. The chemical bond will allow you to complete your project faster, while the mechanical bond may allow you to remove any surface imperfections before the final coat.