wood forming Belgium

...Cleaning and Stripping Stripping (thermal or chemical as needed): Before applying paint to your wooden frames, it is essential to strip them to remove any residues of paint or varnish. Sanding and filling, and replacing seals if necessary. In the case of wooden frames painted with stains, stripping is not necessary, and sanding will be sufficient to reapply a stain. The stain is not "film-forming" (covered with a very thin film) but "flour" (fragmented with wood chips and sawdust).