You can also make your own wood filler by adding sawdust to carpenter's glue to form a paste. [substeps] Another option is epoxy designed for wood, which is hard-wearing and can be carved.
[header] How to use a wood filler [title] Buy or make an appropriate filler. [step] Stainable wood fillers are designed to be stained so you can match them to the rest of the wood. Some water-based wood fillers are also stainable, but they are specifically meant to be used indoors.