Lee's Wood Putty
Wood flour is use to make wood putty and also used as an additive to glues to slow down bleed through when pressing porous veneers.
I stopped buying wood putty and making my own years ago. I'd suggest making small batches. Just add water, your favorite glue and stir.
Store in a plastic sealed container. You may mix in your own colorant by adding colored glue, wood dust or dyed powder.
The putty will accept stain unless you use water proof glue or to much glue.