One of the most common ways to get white cloud out of wood is to use a putty knife. You will need to heat up the putty knife with a hairdryer or other heat source before you can start scraping away at the white cloud. Be sure to go slowly and carefully so that you don't damage the wood beneath. If the putty knife isn't working, you can also try using sandpaper or steel wool. Another method is to use a chemical stripper, but this should be a last resort as it can damage the wood if not used properly.