This attractivel armoire was rescued from a landmark New York City hotel that was going out of business. The piece was in great shape except for one corner that was broken off and missing.
Clamp a flat smooth scrap of wood beneath the repair area to support the polyester resin during application. Spray the board first with WD-40 lubricant to limit sticking and make it release easily after the resin dries.
Scoop a small amount of resin wood filler onto a flat surface and mix in the supplied catalyst before applying it to the furniture repair. Per directions, more catalyst will speed up the chemical reaction that hardens the resin.
Apply the mixture to the broken furniture quickly to fill gaps and form a thick edge that can be shaped like the original later. Neatness is not too critical, but applying sufficient mixture before the resin hardens is important.
Let the resin wood filler set to a firm-but-pliable consistency. Remove most of the excess material from the furniture repair. Start by cutting the edges with a utility knife, leaving enough margin for finer shaping in the next steps.
Unclamp the wood support and begin shaping the fully-hardened resin wood filler. Use a wood rasp or stainless steel micro-blade that is designed to remain free of debris. Contour the surface to mimic the undamaged area of the furniture.
Wrap sandpaper around a wooden dowel to smooth small curved surfaces of the furniture repair, using the free edges to hold the make-shift tool. Match the diameter of the dowel to the size of the curved resin wood filler surface.
Paint the smoothed resin wood filler with artist's acrylic colors. The resin does not accept wood stain. Mix earth tones with red or other highlights to match the wood and apply another coat if the color is not exact.
Mask off the resin wood filler repair when the acrylic paint dries. Painters tape and newspaper work well. Add a face mask for your own protection, because you will be working with an aerosol lacquer in the final step.
Coat the resin wood filler repair with lacquer, holding the spray can a foot from the surface. Move back and forth in several light passes, removing your finger from the spray button at the end of each pass.