Polyester products are mainly composed of Allylic Unsaturated Polyester Resin for direct gloss finish or for special sanding sealers for application over bare wooden substrates for speed of panel preparation as the product can be applied in thick coats at once. After sanding, any type of topcoats can be applied. The other type of Polyester products is a wax-drying one that needs to be polished after sanding. Afterall, all polyester products must be treated on a PU-insulated wooden panels that will seperate the applied polyester coat from the oil found in the wood, as the oil will interfere with the film reaction rendering drying very difficult.