Grilith Holzkitt is a filling compound based on wood flour/alkyd resin/cellulose nitrate containing solvents. Application method: Grilith Holzkitt is pressed into the imperfections with pressure using a narrow spatula. Finally, smooth the repaired area with a moistened spatula. Two thin coats give better results than one thick coat. Let each individual layer dry well. Dried Grilith can be stained and painted over.